noun - the act of making sure that laws and rules are obeyed
noun - the police and other people whose job is to make sure that laws are followed and to protect the public
noun - a special police tool placed on the road to stop a car by making its tires lose air
noun - a person who sees a crime or an accident happen and can describe what they saw
adjective - not working at the moment
noun - a person who talks to others to reach an agreement or to solve a problem
noun - is the act of asking someone (usually a suspect or witness) many questions to get information about a crime
adjective - having been taken by the police and not free to leave
adjective - working secretly, especially as a police officer trying to get information without people knowing who you really are