ten-four

or 10-4

[ ten-fawr, -fohr ]

interjection

, Slang.

1. (used to express affirmation or confirmation):

   Okay, ten-four, I'm on my way.

Word History and Origins

Origin of ten-four¹

First recorded in 1960–65; originally meaning “message received” in ten code ( def )

Example Sentences

It mounted ten four pounders, besides swivels, and was favorably situated to keep the hostile Indians in check.

From Project Gutenberg

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

From Project Gutenberg