1 definition by xyzzy ëL§îX

Top Definition
part of a series of '10-codes' that many security officers & law-enforcement-types use, the '10-20' code refers to receiving a location coordinates from a second party at the other end of the line (over distance radio transmission). '10-4'- meaning that the transmission has been received.
"Soldier.. what's your 10-20?" often shortened to: "what's your 20?"
by xyzzy ëL§îX November 11, 2002

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