noun
plural -trols
the act of walking or going around or through an area, building, etc., in order to make sure that it is safe :the act of patrolling an area [count]
[count] :a group of people, vehicles, etc., that go through an area to make sure that it is safe :a group that patrols an area
verb
-trols; -trolled; -trolling
to walk or go around or through (an area, building, etc.) especially in order to make sure that it is safe [+ obj]