A member of a body of police; a constable.

a member of a police force; "it was an accident, officer"

a bobby familiarly and a constable officially

an officer who is required to give an official bond, and premium is payable from general funds of the city

a citizen serving the public, fulfilling a need for the public, but still a citizen who is charged with the public safety and the public good, but sometimes called to kill or put themselves between the public and danger

an individual with a family and a need to support them and themselves, a retirement pension, medical benefits, etc

a quasi State officer, just as much a subject for pension by the State as a Sheriff

a very useful and important public servant