In the International System of Units and other metric systems of units, multiplying the unit to which it is attached by 1,000. Symbol: k
Kilo- is added to some nouns that refer to units of measurement in order to form other nouns referring to units a thousand times bigger. 100 kilojoules of energy. an explosion of around 20 kilotons. One thousand (10): kilowatt. a thousand - used with units of measurement