an expedition to keep watch over an area, especially by guards or police walking or driving around at regular intervals

we were ordered to investigate on a night patrol

a unit of six to eight Scouts or Guides forming part of a troop

break the Cubs into sixes and Scouts into patrols

keep watch over (an area) by regularly walking or travelling around it

the garrison had to patrol the streets to maintain order

pairs of men were patrolling on each side of the thoroughfare