|Origin:||patrouiller, from patte 'animal's foot'|
pa‧trol1 past tense and past participle patrolled, present participle patrolling [transitive]
to go around the different parts of an area or building at regular times to check that there is no trouble or danger:
Armed guards patrolled the grounds.
an area patrolled by special police units
to drive or walk around an area in a threatening way:
Gangs of youths patrolled the streets at night.