I. K 1 BrE AmE , k /keɪ/ noun ( plural K’s , k’s ) [uncountable and countable]
the 11th letter of the alphabet
II. K 2 /keɪ/ BrE AmE
1 . ( also k ) informal an abbreviation of one thousand :
a salary of £30k a year
2 . an abbreviation of kilobyte or kilobytes
3 . ( also k ) a written abbreviation of kilometre or kilometres :
a 20k international race walker
4 . the abbreviation of Kelvin or Kelvins