# noun. - 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 Girl Scouts or Boy Scouts forming part of a troop. * break the Cubs into sixes and Scouts into patrols
# verb. - keep watch over (an area) by regularly walking or traveling around or through it. * the garrison had to patrol the streets to maintain order