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English definition of “patrol”

patrol

verb [I or T]     /pəˈtrəʊl/ US  /-ˈtroʊl/ (-ll-)
(especially of soldiers or the police) to go around an area or a building to see if there is any trouble or danger: The whole town is patrolled by police because of the possibility of riots. A security guard with a dog patrols the building site at night. Coastguards found a deserted boat while patrolling (along) the coast.Defending and protectingBacking, supporting and defendingPreserving and savingThe police generally
(Definition of patrol verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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