[Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/dictionaries/school/w/watt.html)

[home](https://md.mova.elamur.ai/free/en/) / [dictionaries](https://md.mova.elamur.ai/free/en/dictionaries/) / [The school dictionary](https://md.mova.elamur.ai/free/en/dictionaries/school/) / watt

[← W](https://md.mova.elamur.ai/free/en/dictionaries/school/W/)

# watt

«watt» in Mova's school dictionary: **The unit used to measure power: how fast energy is used…** — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

### part of speech

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

### meaning for a pupil

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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/#m2)

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

### In the corpora

- [James Watt greatly improved the steam engine; he did not invent it, as earlier steam engines already pumped water out of mines.](https://md.mova.elamur.ai/free/en/corpora/school/history/30-the-industrial-revolution/6/)

### Trees and pragmatics

[Every meaning and example of «watt» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/W/watt/), each sentence with its dependency tree and frames.