prisoner of war
From Longman Dictionary of Contemporary EnglishRelated topics: Jail & punishment, Militaryprisoner of warˌprisoner of ˈwar noun [countable] SCJPMa soldier, member of the navy etc who is caught by the enemy during a war and kept as a prisonerExamples from the Corpusprisoner of war• He might be a prisoner of war.• My grandfather was a prisoner of war of the U. S. Army for 26 years.