K

Universal Words noun, abbreviation noun (also k) [C,U] (plural K's, k's ) the 11th letter of the English alphabet: 'King' begins with (a) K / 'K'. abbreviation (plural K) 1 (informal) one thousand: She earns 40K (= ｣40000) a year. 2 kilometre(s): a 10K race 3 (computing) KILOBYTE(S) 4 KELVIN(S)