From Longman Dictionary of Contemporary Englishpolice officerpoˈlice ˌofficer ●●● S3 W2 noun [countable] SCPa member of the police
Examples from the Corpus
police officer• Just before their last concert, a police officer arrives with a strange message for them.• There is particular concern that an informant may try to set police officer against police officer and force against force.• It eventually dawned on me that the young moran and the police officer had known all along where we were.• It depends on the police officer. 