1. The 11th letter of the Roman alphabet
   "The company name 'Kmart' starts with a K";
   - K, kay

1. Denoting a quantity consisting of 1,000 items or units
   - thousand, one thousand, 1000, m

1. 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
   - potassium, atomic number 19
    
2. [slang] A street name for ketamine
   "He was arrested for possession of Special K";
   - special K [slang], cat valium [slang]
    
3. The cardinal number that is the product of 10 and 100
   - thousand, one thousand, 1000, M, G, thou [informal]
    
4. A unit of information equal to 1024 bytes
   "The small text file was only a few Ks in size";
   - kilobyte, kibibyte, KB, kB, KiB
    
5. A unit of information equal to 1000 bytes
   "The text file was only a few Ks in size";
   - kilobyte, KB, kB
    
6. The basic unit of thermodynamic temperature adopted under the Système International d'Unités
   "Absolute zero is defined as 0 K";
   - kelvin

Derived forms: ks, Ks

See also: cardinal

Type of: alphabetic character, computer memory unit, ket [informal], Ketalar, ketamine, ketamine hydrochloride, large integer, letter, letter of the alphabet, metal, metallic element, temperature unit

Part of: brine, carnallite, kainite, langbeinite, Latin alphabet, M, MB, mebibyte, megabyte, MiB, Roman alphabet, saltwater, seawater, sylvine, sylvite

Encyclopedia: K, Ellen