police /pəˈliːs/ noun 1. the civil force of a state, responsible for the prevention and detection of crime and the maintenance of public order. "when someone is killed, the police have to be informed" synonyms: police force, police officers, policemen, policewomen, officers of the law, the forces of law and order, law enforcement officers, law enforcement agency; More verb 1. (of a police force) have the duty of maintaining law and order in or at (an area or event). synonyms: maintain law and order in, keep the peace in, keep guard over, keep watch on, watch over, guard, protect, defend, patrol, make the rounds of "it would not be possible to police the area effectively"