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# watt

noun (a watt, watts); name (Watt)

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

## Everyday

1. (science) The unit used to measure power: how fast energy is used or produced. One watt is one joule of energy every second. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#m1)
2. (a name) James Watt was a Scottish engineer who improved the steam engine; the unit is named after him. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#m2)

### In the lessons

In science and energy lessons watts tell how powerful a device is: a light bulb might use 10 watts, a kettle 3,000 watts (3 kilowatts). Saving energy means choosing devices with fewer watts and switching them off. Electricity bills count kilowatt-hours. Phrases: a 60-watt bulb, kilowatt, megawatt, watts of power.

### Examples

- An LED bulb uses only about 10 watts. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x1)
- The kettle uses 3,000 watts, or 3 kilowatts. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x2)
- A watt is a unit of power. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x3)
- The watt is named after James Watt. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x4)
- Which uses more watts, the hairdryer or the phone charger? [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x5)
- The wind turbine makes two million watts, or two megawatts. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#x6)

### Note

Symbol W; 1 kilowatt (kW) = 1,000 watts; 1 megawatt (MW) = 1,000,000 watts. Homophone trap: watt sounds like "what". Maths: energy = power × time, so a 100-watt lamp on for 10 hours uses 1,000 watt-hours = 1 kilowatt-hour. Watts measure power, volts measure electrical push, amps measure current.

## On Mova

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