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# English words: O

[A](https://md.dictionary.elamur.ai/free/en/english/a/) · [B](https://md.dictionary.elamur.ai/free/en/english/b/) · [C](https://md.dictionary.elamur.ai/free/en/english/c/) · [D](https://md.dictionary.elamur.ai/free/en/english/d/) · [E](https://md.dictionary.elamur.ai/free/en/english/e/) · [F](https://md.dictionary.elamur.ai/free/en/english/f/) · [G](https://md.dictionary.elamur.ai/free/en/english/g/) · [H](https://md.dictionary.elamur.ai/free/en/english/h/) · [I](https://md.dictionary.elamur.ai/free/en/english/i/) · [J](https://md.dictionary.elamur.ai/free/en/english/j/) · [K](https://md.dictionary.elamur.ai/free/en/english/k/) · [L](https://md.dictionary.elamur.ai/free/en/english/l/) · [M](https://md.dictionary.elamur.ai/free/en/english/m/) · [N](https://md.dictionary.elamur.ai/free/en/english/n/) · **O** · [P](https://md.dictionary.elamur.ai/free/en/english/p/) · [Q](https://md.dictionary.elamur.ai/free/en/english/q/) · [R](https://md.dictionary.elamur.ai/free/en/english/r/) · [S](https://md.dictionary.elamur.ai/free/en/english/s/) · [T](https://md.dictionary.elamur.ai/free/en/english/t/) · [U](https://md.dictionary.elamur.ai/free/en/english/u/) · [V](https://md.dictionary.elamur.ai/free/en/english/v/) · [W](https://md.dictionary.elamur.ai/free/en/english/w/) · [X](https://md.dictionary.elamur.ai/free/en/english/x/) · [Y](https://md.dictionary.elamur.ai/free/en/english/y/) · [Z](https://md.dictionary.elamur.ai/free/en/english/z/)

453 words under O; 201–300 on this page.

Pages: [1](https://md.dictionary.elamur.ai/free/en/english/o/) · [2](https://md.dictionary.elamur.ai/free/en/english/o/page/2/) · **3** · [4](https://md.dictionary.elamur.ai/free/en/english/o/page/4/) · [5](https://md.dictionary.elamur.ai/free/en/english/o/page/5/)

- [oppressive](https://md.dictionary.elamur.ai/free/en/english/oppressive/) — Cruel and unfair, keeping people down and taking away their freedom: an oppressive ruler.
- [oppressor](https://md.dictionary.elamur.ai/free/en/english/oppressor/) — A person who treats others cruelly and unfairly and uses power to keep them down. — Jewish tradition
- [opprobrium](https://md.dictionary.elamur.ai/free/en/english/opprobrium/) — Public shame or disgrace, bad name. — Jewish tradition
- [optic](https://md.dictionary.elamur.ai/free/en/english/optic/) — To do with the eye or sight: «the optic nerve».
- [optical](https://md.dictionary.elamur.ai/free/en/english/optical/) — To do with seeing and the eyes. — everyday · Jewish tradition
- [optician](https://md.dictionary.elamur.ai/free/en/english/optician/) — An optician is a person whose job is to test people's eyes and make or sell glasses and contact lenses.
- [optimistic](https://md.dictionary.elamur.ai/free/en/english/optimistic/) — Hopeful and believing good things will happen.
- [option](https://md.dictionary.elamur.ai/free/en/english/option/) — One of the things you can choose from.
- [optional](https://md.dictionary.elamur.ai/free/en/english/optional/) — Something you can choose to do or have, but you do not have to.
- [optometrist](https://md.dictionary.elamur.ai/free/en/english/optometrist/) — An optometrist is a person trained to test people's eyesight, check eye health and prescribe glasses or contact lenses.
- [opus](https://md.dictionary.elamur.ai/free/en/english/opus/) — A Latin word meaning a work, especially a piece of writing or music. — Jewish tradition
- [or](https://md.dictionary.elamur.ai/free/en/english/or/) — Or gives a choice between two or more things: tea or juice? — everyday · Jewish tradition
- [oracle](https://md.dictionary.elamur.ai/free/en/english/oracle/) — In ancient Greece and Rome, a priest or priestess through whom people believed the gods gave advice or told the future, or the holy place… — everyday · Jewish tradition
- [oracular](https://md.dictionary.elamur.ai/free/en/english/oracular/) — Oracular means like an oracle: giving wise-sounding answers or predictions that are often hard to understand.
- [oral](https://md.dictionary.elamur.ai/free/en/english/oral/) — Oral means spoken, not written: an oral test or an oral report is done by talking.
- [orally](https://md.dictionary.elamur.ai/free/en/english/orally/) — By speaking, not in writing, as in "answer orally".
- [orang](https://md.dictionary.elamur.ai/free/en/english/orang/) — Short for orangutan, the large red-haired ape of Borneo and Sumatra.
- [orange](https://md.dictionary.elamur.ai/free/en/english/orange/) — An orange is a round, juicy fruit with a thick skin; it grows on a tree.
- [orangutan](https://md.dictionary.elamur.ai/free/en/english/orangutan/) — An orangutan is a large, intelligent ape with long reddish-orange hair and very long arms, which lives in the rainforests of Borneo and…
- [oration](https://md.dictionary.elamur.ai/free/en/english/oration/) — An oration is a formal speech, often given at a special ceremony such as a funeral.
- [orator](https://md.dictionary.elamur.ai/free/en/english/orator/) — An orator is a person who is skilled at making speeches in public.
- [oratory](https://md.dictionary.elamur.ai/free/en/english/oratory/) — The skill of giving powerful, good speeches in public.
- [orb](https://md.dictionary.elamur.ai/free/en/english/orb/) — An orb is a ball or round object, especially one that glows. — everyday · Jewish tradition
- [orbit](https://md.dictionary.elamur.ai/free/en/english/orbit/) — An orbit is the curved path of a planet, moon or satellite going around a star or planet. — everyday · Jewish tradition
- [orbital](https://md.dictionary.elamur.ai/free/en/english/orbital/) — Orbital means to do with an orbit, the path of something going round a planet, star or moon.
- [orca](https://md.dictionary.elamur.ai/free/en/english/orca/) — An orca, also called a killer whale, is a large black-and-white sea mammal with a tall back fin; it is actually the biggest member of the…
- [orchard](https://md.dictionary.elamur.ai/free/en/english/orchard/) — An orchard is a piece of land with many fruit trees, like apple, pear, cherry or orange trees, often planted in rows.
- [orchestra](https://md.dictionary.elamur.ai/free/en/english/orchestra/) — An orchestra is a large group of musicians who play many instruments together, such as violins, flutes, trumpets and drums.
- [orchestral](https://md.dictionary.elamur.ai/free/en/english/orchestral/) — To do with an orchestra or written for an orchestra, a large group of musicians playing strings, woodwind, brass and percussion together.
- [orchid](https://md.dictionary.elamur.ai/free/en/english/orchid/) — An orchid is a beautiful flower with petals of unusual shapes; there are many thousands of kinds.
- [ordain](https://md.dictionary.elamur.ai/free/en/english/ordain/) — To ordain someone is to make them a priest, minister or rabbi in a special religious ceremony. — everyday · Jewish tradition
- [ordained](https://md.dictionary.elamur.ai/free/en/english/ordained/) — Ordained means made a priest, minister or religious leader in a special ceremony. — everyday · Jewish tradition
- [ordeal](https://md.dictionary.elamur.ai/free/en/english/ordeal/) — A very hard, painful or frightening experience that goes on for some time.
- [order](https://md.dictionary.elamur.ai/free/en/english/order/) — Order is the way things follow one after another: in alphabetical order, in order of size. — everyday · Jewish tradition
- [ordering](https://md.dictionary.elamur.ai/free/en/english/ordering/) — The way things are put in order; arranging or arrangement. — Jewish tradition
- [orderly](https://md.dictionary.elamur.ai/free/en/english/orderly/) — Orderly means tidy and well arranged: an orderly desk.
- [ordinal](https://md.dictionary.elamur.ai/free/en/english/ordinal/) — An ordinal number shows the place or position of something in order: first, second, third, fourth and so on.
- [ordinance](https://md.dictionary.elamur.ai/free/en/english/ordinance/) — A rule or law that must be kept, especially one given by an authority. — Jewish tradition
- [ordinarily](https://md.dictionary.elamur.ai/free/en/english/ordinarily/) — Usually; in the normal way: Ordinarily, I walk to school.
- [ordinary](https://md.dictionary.elamur.ai/free/en/english/ordinary/) — Ordinary means normal, usual or plain; not special or different. — everyday · Jewish tradition
- [ordinate](https://md.dictionary.elamur.ai/free/en/english/ordinate/) — The y-coordinate of a point on a graph: how far up or down the point is from the x-axis.
- [ordination](https://md.dictionary.elamur.ai/free/en/english/ordination/) — Ordination is the ceremony in which a person is made a priest, minister, deacon or rabbi, usually by a bishop or other leader.
- [ordnance](https://md.dictionary.elamur.ai/free/en/english/ordnance/) — Military weapons, especially large guns, bombs, shells and ammunition.
- [ore](https://md.dictionary.elamur.ai/free/en/english/ore/) — Ore is rock or earth that has a useful metal in it, like iron or copper, which people dig up and take the metal out of. — everyday · Jewish tradition
- [organ](https://md.dictionary.elamur.ai/free/en/english/organ/) — A part of the body that has a special job, like the heart, lungs, brain, stomach or skin. — everyday · Jewish tradition
- [organic](https://md.dictionary.elamur.ai/free/en/english/organic/) — Organic food is grown or raised without man-made chemicals such as artificial pesticides and fertilisers.
- [organisation](https://md.dictionary.elamur.ai/free/en/english/organisation/) — An organisation is a group of people who work together for a purpose, such as a charity, club, company or school.
- [organise](https://md.dictionary.elamur.ai/free/en/english/organise/) — To organise something is to plan and arrange it: organise a party, a trip or a game.
- [organised](https://md.dictionary.elamur.ai/free/en/english/organised/) — Organised means tidy and well planned, so things are where they should be and done on time.
- [organiser](https://md.dictionary.elamur.ai/free/en/english/organiser/) — A person who plans and arranges an event or activity, like a party, a trip or a sports day.
- [organism](https://md.dictionary.elamur.ai/free/en/english/organism/) — Any living thing, such as an animal, plant, fungus or bacterium.
- [organization](https://md.dictionary.elamur.ai/free/en/english/organization/) — A group of people who work together for a purpose, such as a charity, a club, a company or a school.
- [organize](https://md.dictionary.elamur.ai/free/en/english/organize/) — To arrange things in a neat and sensible order. — Jewish tradition
- [organized](https://md.dictionary.elamur.ai/free/en/english/organized/) — Organized means put in a neat order, or sorted into groups.
- [orient](https://md.dictionary.elamur.ai/free/en/english/orient/) — To find out or work out where you are or which way you are facing, as in "orient yourself with a map". — everyday · Jewish tradition
- [oriental](https://md.dictionary.elamur.ai/free/en/english/oriental/) — From or to do with the countries of East Asia, like China, Japan and Korea. — everyday · Jewish tradition
- [orientation](https://md.dictionary.elamur.ai/free/en/english/orientation/) — The direction something faces or points: north, south, up, sideways.
- [oriented](https://md.dictionary.elamur.ai/free/en/english/oriented/) — Oriented means pointed or turned in a certain direction.
- [orifice](https://md.dictionary.elamur.ai/free/en/english/orifice/) — An opening in the body, such as the mouth, nose or ears. — Jewish tradition
- [origami](https://md.dictionary.elamur.ai/free/en/english/origami/) — The Japanese art of folding paper into shapes like birds, animals and boxes, usually without cutting or glue.
- [origin](https://md.dictionary.elamur.ai/free/en/english/origin/) — The origin of something is where or how it began. — everyday · Jewish tradition
- [original](https://md.dictionary.elamur.ai/free/en/english/original/) — First; existing at the beginning, before changes: «the original plan». — everyday · Jewish tradition
- [originality](https://md.dictionary.elamur.ai/free/en/english/originality/) — Originality is being new and different, not copied from others. — everyday · Jewish tradition
- [originally](https://md.dictionary.elamur.ai/free/en/english/originally/) — At first; in the beginning, before something changed. — everyday · Jewish tradition
- [originate](https://md.dictionary.elamur.ai/free/en/english/originate/) — To begin or come from a place, time or source (the game originated in Scotland). — everyday · Jewish tradition
- [originator](https://md.dictionary.elamur.ai/free/en/english/originator/) — The originator of something is the person who first thought of it, made it or started it. — everyday · Jewish tradition
- [ornament](https://md.dictionary.elamur.ai/free/en/english/ornament/) — An ornament is a small object used to make a room, a shelf or a Christmas tree look nice, rather than for a practical use. — everyday · Jewish tradition
- [ornamental](https://md.dictionary.elamur.ai/free/en/english/ornamental/) — Ornamental means used to decorate and make something look nice, rather than for a practical use.
- [orphan](https://md.dictionary.elamur.ai/free/en/english/orphan/) — An orphan is a child whose parents have both died. — everyday · Jewish tradition
- [orphanage](https://md.dictionary.elamur.ai/free/en/english/orphanage/) — An orphanage is a home where children who have no parents live and are cared for.
- [orthodontist](https://md.dictionary.elamur.ai/free/en/english/orthodontist/) — A dentist who specialises in straightening teeth and fixing the way teeth and jaws fit together, often by fitting braces.
- [orthodox](https://md.dictionary.elamur.ai/free/en/english/orthodox/) — Orthodox means following the usual, accepted ideas or ways of doing something. — everyday · Jewish tradition
- [orthography](https://md.dictionary.elamur.ai/free/en/english/orthography/) — Orthography is the system of spelling and writing a language: which letters stand for which sounds, and rules for capital letters, hyphens… — everyday · Jewish tradition
- [orthoptist](https://md.dictionary.elamur.ai/free/en/english/orthoptist/) — A health professional who checks and treats problems with how the eyes move and work together, such as a squint or a lazy eye.
- [oryx](https://md.dictionary.elamur.ai/free/en/english/oryx/) — An oryx is a large antelope of the deserts and dry grasslands of Africa and Arabia, with very long, straight, pointed horns and a pale…
- [os](https://md.dictionary.elamur.ai/free/en/english/os/) — OS is short for "operating system", the main program that runs a computer or phone, like Windows, macOS, Android or iOS. — everyday · Jewish tradition
- [oscar](https://md.dictionary.elamur.ai/free/en/english/oscar/) — An Oscar is a gold statue given each year as a top prize for films, also called an Academy Award.
- [oscillate](https://md.dictionary.elamur.ai/free/en/english/oscillate/) — To swing or move back and forth regularly, like a pendulum.
- [oscillating](https://md.dictionary.elamur.ai/free/en/english/oscillating/) — Swinging or moving back and forth regularly. — everyday · Jewish tradition
- [oscillation](https://md.dictionary.elamur.ai/free/en/english/oscillation/) — A regular movement back and forth, like a pendulum swing.
- [osier](https://md.dictionary.elamur.ai/free/en/english/osier/) — A kind of willow tree or bush that grows by rivers and wet ground, with long thin bendy shoots.
- [osprey](https://md.dictionary.elamur.ai/free/en/english/osprey/) — An osprey is a large bird of prey with brown wings and a white underside that dives feet-first into water to catch fish.
- [ossified](https://md.dictionary.elamur.ai/free/en/english/ossified/) — Ossified means turned into bone: soft cartilage that has hardened into bone, as happens in a growing child's skeleton.
- [ostentation](https://md.dictionary.elamur.ai/free/en/english/ostentation/) — Ostentation is showing off to be noticed, with too much display of wealth or fine things.
- [ostler](https://md.dictionary.elamur.ai/free/en/english/ostler/) — An ostler is a man who looked after horses at an inn in the old days.
- [ostracise](https://md.dictionary.elamur.ai/free/en/english/ostracise/) — To leave someone out of a group on purpose and refuse to talk to them or include them.
- [ostracism](https://md.dictionary.elamur.ai/free/en/english/ostracism/) — Leaving someone out on purpose, so they are not included by a group.
- [ostrich](https://md.dictionary.elamur.ai/free/en/english/ostrich/) — An ostrich is a very large bird from Africa that cannot fly but runs very fast on its long, strong legs. — everyday · Jewish tradition
- [other](https://md.dictionary.elamur.ai/free/en/english/other/) — Other means a different one, not this one. — everyday · Jewish tradition
- [otherwise](https://md.dictionary.elamur.ai/free/en/english/otherwise/) — Otherwise means «if not» or «or else»: what will happen if something is not done. — everyday · Jewish tradition
- [otoscope](https://md.dictionary.elamur.ai/free/en/english/otoscope/) — An otoscope is a small medical tool with a light and a magnifying lens that a doctor uses to look inside your ear.
- [ottawa](https://md.dictionary.elamur.ai/free/en/english/ottawa/) — Ottawa: the capital city of Canada, in the province of Ontario, on the Ottawa River.
- [otter](https://md.dictionary.elamur.ai/free/en/english/otter/) — An otter is a playful animal with smooth brown fur, short legs, webbed feet and a long tail that lives near rivers or the sea and swims…
- [ottoman](https://md.dictionary.elamur.ai/free/en/english/ottoman/) — The Ottoman Empire was a large, long-lasting empire ruled by Turkish sultans from Istanbul, covering Turkey and lands in south-east…
- [ought](https://md.dictionary.elamur.ai/free/en/english/ought/) — Should, or was right to; the old noun sense (anything) is no longer used.
- [ounce](https://md.dictionary.elamur.ai/free/en/english/ounce/) — An ounce is a small unit of weight; there are 16 ounces in a pound, and an ounce is about 28 grams.
- [ousel](https://md.dictionary.elamur.ai/free/en/english/ousel/) — An ousel is an old word for a dark bird of the thrush family, such as a blackbird.
- [oust](https://md.dictionary.elamur.ai/free/en/english/oust/) — To oust someone is to force them out of a place, job or position so that they lose it.
- [out](https://md.dictionary.elamur.ai/free/en/english/out/) — Out means away from the inside of something. — everyday · Jewish tradition
- [outback](https://md.dictionary.elamur.ai/free/en/english/outback/) — The outback is the huge, dry, mostly empty land far inland in Australia, far away from the cities and the coast.