noun, noun or participle which takes 'suru', intransitive verb
patrol; round; tour; going around
Used for making rounds, patrolling, or touring an area, often in official or systematic contexts (police, security, inspection).
警察官が夜の街を巡回している。
Police officers are patrolling the streets at night.
警備員が建物の中を巡回する。
Security guards make rounds inside the building.