police /pəˈli:s/ n. 警察局，警方(集合名词，与pl.动词连用)：police dog 警犬; police car 警车； police-office 警察总局；police station 警察分局；police-officer 警官The police have caught the murderer.警方已抓获那个杀人犯。

 policeman /pəˈli:smən/ ( pl. policemen) n. 警察(女警察为policewoman)：The policeman is on the watch for thieves.警察提防着窃贼。