K (Adjective) — Denoting a quantity consisting of 1,000 items or units.
K (Noun) — The 11th letter of the Roman alphabet.
K (Noun) — The basic unit of thermodynamic temperature adopted under the Systeme International d'Unites.
K (Noun) — A unit of information equal to 1024 bytes.
K (Noun) — A light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite.
K (Noun) — A street name for ketamine.
K (Noun) — The cardinal number that is the product of 10 and 100.
K (Noun) — A unit of information equal to 1000 bytes.