1. (noun)watt, W a unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm Synonyms: west, wolfram, due west, atomic number 74, double-u, watt, westward, tungsten
2. (noun)Watt, James Watt Scottish engineer and inventor whose improvements in the steam engine led to its wide use in industry (1736-1819)