patroller Definition

patrol
verb patrolled, patrolling

tr & intr
1. To make a regular systematic tour of (an area) to maintain security or surveillance.

Thesaurus: guard, police, watch, inspect, stake out.
intr
2. Said of a police officer: to be on duty on a beat.

noun

1. The act of patrolling.

Example: on patrol
Thesaurus: surveillance, protecting, policing, defence.
2. A person or group of people performing this duty.

Thesaurus: guard, security, watchman, sentinel.
3. A body of aircraft, ships, etc carrying out this duty.
4. Any of the units of six or so into which a troop of Scouts or Guides is divided.

Derivative: patroller
noun

Etymology: 17c: from French patrouiller.