[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/noxious/)

[dictionaries](https://md.dictionary.elamur.ai/free/en/) / [English](https://md.dictionary.elamur.ai/free/en/english/) / [N](https://md.dictionary.elamur.ai/free/en/english/n/) / noxious

# noxious

adjective (noxious; more noxious)

«noxious» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. Harmful or poisonous, especially gases, fumes and chemicals. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m1)
2. Very unpleasant, as in "a noxious smell". [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m2)
3. (of plants) Harmful weeds that are a pest to farms, as in "noxious weeds" (Australia, US, Canada). [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#m3)

### In the lessons

Used in science and safety (noxious gases from cars, factories or fires can make people ill; never mix cleaning products because they can give off noxious fumes) and in stories about smells. In Australia and North America "noxious weeds" are plants landowners must control by law.

### Examples

- The factory let out noxious fumes. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x1)
- Never mix bleach with other cleaners; it makes noxious gases. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x2)
- A noxious smell came from the drain. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x3)
- Some plants are listed as noxious weeds. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x4)
- Car exhaust contains noxious gases. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x5)
- The witch stirred a noxious green potion. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x6)
- The firefighters wore masks against the noxious smoke. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x7)
- By the influence of his warm and gentle rays he disperses the noxious vapours of the night, assists the grain to ripen and the flowers to bloom. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/#x8)

### Note

Formal; everyday words: "harmful", "poisonous", "toxic". Pronounced "NOK-shus". Safety: if you smell strong fumes, get to fresh air and tell an adult.

## On Mova

- [Trees and pragmatics of «noxious» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/N/noxious/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«noxious» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/noxious.html) on Mova free.