k k /ˈkeɪ/

adjective

1. Denoting a quantity consisting of 1,000 items or units  ( k , m , one thousand , 1000 , thousand )
   denoting a quantity consisting of 1,000 items or units
     The charity raised a thousand dollars for the cause.
   The charity raised a thousand dollars for the cause.
   

 K

noun

1. () The basic unit of thermodynamic temperature adopted under the Système International d'Unités  ( kelvin , K )
   the basic unit of thermodynamic temperature adopted under the Système International d'Unités
   
2. Street names for ketamine  ( cat valium , green , honey oil , jet , K , special K , super acid , super C )
   street names for ketamine
   
3. The 11th letter of the Roman alphabet  ( K , kay )
   the 11th letter of the Roman alphabet
   
4. A unit of information equal to 1024 bytes  ( K , kB , KiB , kibibyte , kilobyte )
   a unit of information equal to 1024 bytes
   
5. A unit of information equal to 1000 bytes  ( K , kB , kilobyte )
   a unit of information equal to 1000 bytes
   
6. The cardinal number that is the product of 10 and 100  ( 1000 , chiliad , G , grand , K , M , one thousand , thou , yard , thousand )
   the cardinal number that is the product of 10 and 100
    There are one thousand meters in a kilometer
   There are one thousand meters in a kilometer
   
7. 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  ( atomic number 19 , K , potassium )
   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 is an electrolyte that helps maintain proper fluid balance in the body.
   Potassium is an electrolyte that helps maintain proper fluid balance in the body.