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Meaning of “random breath test” in the English Dictionary

"random breath test" in British English

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random breath testnoun [C]

uk   /ræn.dəm ˈbreθ ˌtest/  us   /ræn.dəm ˈbreθ ˌtest/ (abbreviation RBT) Australian English
a test given by the police to drivers chosen by chance, to measure the amount of alcohol the drivers have in their blood
(Definition of random breath test from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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