policeman : Idioms & Phrases
military policeman
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noun a member of the military police who polices soldiers and guards prisoners
MP.
WordNet
motorcycle policeman
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noun a policeman who rides a motorcycle (and who checks the speeds of motorists)
motorcycle cop; speed cop.
WordNet
policeman bird
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noun large mostly white Australian stork
jabiru; Xenorhyncus asiaticus; black-necked stork.