prisoner of war UK /ˈpɹɪz.(ə).nə əv ˈwɔː/US /ˈpɹɪz.(ə).nɚ əv ˈwoɹ/ noun1 •A combatant or soldier who is captured by an enemy power during or immediately after an armed conflict.As a prisoner of war, he was interrogated by his enemy captors. formsprisoners of war