plainclothesman

Noun

A police officer (especially a detective) who wears civilian clothes when on duty.

Japanese Meaning

便衣警官：任務中に制服ではなく私服を着用する警察官（特に捜査官）

The plainclothesman blended into the crowd as he observed the suspect's movements.

私服の警察官は容疑者の動きを観察しながら群衆に溶け込んだ。

Sense（1）

A police officer (especially a detective) who wears civilian clothes when on duty.

Coordinate term: plainclotheswoman

plainclothesmen

（ plural ）