nounplural noun Ks, plural noun K's
1The eleventh letter of the alphabet.thousand dollars, thousand pounds
- 1.1Denoting the next after J in a set of items, categories, etc.
4 informal OK.
- ‘K, I'm back’
5North American Kindergarten.
6King (used especially in describing play in card games and recording moves in chess)‘declarer overruffed with ♦K and led another spade’
7Knit (as an instruction in knitting patterns)
- ‘K 42 rows’
8Köchel (catalog of Mozart's works)
- ‘the Sinfonia Concertante, K364’
9(also k)informal Thousand (used chiefly in expressing salaries or other sums of money).
From kilo- ‘thousand’.
The chemical element potassium.
From modern Latin kalium.
2in combination (in units of measurement) kilo-
- ‘a distance of 700 kpc’
1A constant in a formula or equation.