/pəˈtrəʊl ||; pəˈtrol/noun1 [C,U] the act of going round an area, building, etc at regular times to make sure that it is safe and that nothing is wrong 巡逻；巡查: a police car on patrol in the area 一辆在该地区巡逻的警车
2 [C] a group of soldiers, vehicles, etc that patrol sth 一队巡逻兵；一队巡逻车辆: a naval/police patrol 海军巡逻队；警察巡逻队a patrol car/boat 巡逻车；巡逻艇