Definition of "k"

The eleventh letter of the English alphabet, called kay and written in the Latin script.  examples

The first letter of callsigns allocated to American broadcast television and radio stations west of the Mississippi river.  examples

The ordinal number eleventh, derived from this letter of the English alphabet, called kay and written in the Latin script.  examples

(computing) A kilobyte (more formally KB or kB).  examples

(computing) A kilobit (more formally kb), especially in measuring Internet connection.  examples

(colloquial) kilometre or kilometres.  examples

(colloquial) thousand or thousands.  examples

The SI measurement value of 1,000  examples

(colloquial, text messaging, Internet slang) OK