Top Definition
10-9 is a police, and other 10 code using service, which has a meaning the same as, "repeat" or "say-again"
Can you please 10-9 your last transmission, It was a little 10-1 (distorted, broken up).
by Chris October 25, 2004
7 Words related to 10-9
109 or Augusta 109 is a type of helicopter.
"Let's take the 109."
by Diego July 29, 2003

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