Definition of dog tag noun from the Oxford Advanced Learner's Dictionary


dog tag

BrE BrE//ˈdɒɡ tæɡ//
; NAmE NAmE//ˈdɔːɡ tæɡ//
(North American English, slang)
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a small piece of metal that US soldiers wear round their necks with their name and number on it
See the Oxford Advanced American Dictionary entry: dog tag