Dictionary.com
definitions
  • synonyms

ten-four

[ten-fawr, -fohr]
interjection Citizens Band Radio Slang.
  1. (used to express affirmation or confirmation).
Show More
Compare ten code.

Origin of ten-four

First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ten-four

Historical Examples

  • Ten-four meant ten and a half; for in those primitive days knots were divided into eight fathoms.

    From Sail to Steam, Recollections of Naval Life

    Captain A. T. Mahan