► 名詞お巡りさん  [(2)おまわりさん]  [coll]    
meaning:  police  rank: 3☆ 
交番に
行ったがお巡りさんはいなかった ⇨ I went to a street police station but there was no police officer  
(☛ Literally means “a person who goes around”)More examples:- 交番に行ったがお巡りさんはいなかった ⇨ I went to a mini police station but there was no police officer