Dictionary.com
Thesaurus.com

plainclothesman

American  
[pleyn-klohz-muhn, -man, -klohthz-] / ˈpleɪnˈkloʊz mən, -ˌmæn, -ˈkloʊðz- /
Or plainclothes man

noun

PLURAL

plainclothesmen
  1. a police officer, especially a detective, who wears ordinary civilian clothes while on duty.


Etymology

Origin of plainclothesman

First recorded in 1925–30; plain clothes + man

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The plainclothesman in front of her flashed a badge, showed a search warrant, and brusquely asked Mary for permission to enter.

From Literature

Anyone could see Garner talking to a clutch of uniformed and plainclothesmen in front of a store on Bay Street, in Staten Island, on July 17th.

From The New Yorker

A video filmed by TVB, a usually pro-government television station, showed a bearded man in a black T-shirt being led away by plainclothesman, his hands behind him.

From New York Times

“The only people we get in here at night anymore is plainclothesmen,” Darlene said.

From Literature

A squad of plainclothesmen that happened to be nearby was ordered to respond to the call.

From US News