- thousand, a thousand, one thousand, 1000, m, k - denoting a quantity consisting of 1,000 items or units
 Antonym: ordinal (indirect, via cardinal)
 
- kelvin, K - the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites
 --1 is a kind of temperature unit
 
- potassium, K, atomic number 19 - 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
 --2 is a kind of metallic element, metal
 --2 is a substance ofseawater, saltwater, brine; carnallite; kainite; langbeinite; sylvite, sylvine 
- thousand, one thousand, 1000, M, K, chiliad, G, grand, thou, yard - the cardinal number that is the product of 10 and 100
 --3 is a kind of large integer
 
- kilobyte, K, KB - a unit of information equal to one thousand (1024) bytes
 --4 is a kind of computer memory unit
 --4 is a part of megabyte, MB
 --4 has parts: word
- K - the 11th letter of the Roman alphabet
 --5 is a kind of letter, letter of the alphabet, alphabetic character
 --5 is a member of Roman alphabet, Latin alphabet
- K, jet, super acid, special K, honey oil, green, cat valium, super C - street names for ketamine
 --6 is a kind of ketamine, ketamine hydrochloride, Ketalar
 
- K, jet, super acid, special K, honey oil, green, cat valium, super C - street names for ketamine