Definition of trooper noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈtruːpə(r)//
    ; NAmE NAmE//ˈtruːpər//
    The army
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  1. 1a soldier of low rank in the part of an army that uses tanks or horses He was a cavalry trooper before being injured at the battle of Corunna. See related entries: The army
  2. 2(North American English) = state trooper See related entries: The army
  3. Idioms (old-fashioned, British English) to often use very rude or offensive language
See the Oxford Advanced American Dictionary entry: trooper