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English definition of “ten-four”

ten-four

exclamation     /ˌtenˈfɔːr/ US  /-ˈfɔːr/ (also 10-4) mainly US
said to mean that a message has been received Words and phrases expressing agreement and acceptance
(Definition of ten-four exclamation from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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