Definition of plain clothes in English:

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plain clothes

Pronunciation: /ˌplān ˈklō(T͟H)z/

plural noun

Ordinary clothes rather than uniform, especially when worn as a disguise by police officers: a detective in plain clothes
More example sentences
  • He was chased by three to five policemen in plain clothes.
  • We wore plain clothes rather than uniform and slept in them, including our shoes, for weeks on end.
  • Some of that misunderstanding may have arisen innocently, if for example a witness saw a man leaping the barrier without realising that he was in fact a police officer in plain clothes.


[attributive] (plainclothes)
(Especially of a police officer) wearing ordinary clothes instead of a uniform: plainclothes troopers
More example sentences
  • He was trapped by plainclothes police officers at Doncaster railway station.
  • The publication took the form of the sale of a packet of photographs to two plain clothes police officers.
  • Extra uniformed and plain clothes police officers will be patrolling the streets of Ashton town centre as part of the initiative.
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