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

“Ten-four,” the dispatcher said, signing off.

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“Ten-four! We have bodies up here!” they announce.

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"Ten-four, everything's fine," an officer radios back.

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"Well, I suppose I must; log her ten-four."

Read more on Project Gutenberg

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

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