Formal or literary term for a prisoner of war. In modern Japanese, 捕虜 is more common.
See also: 捕虜
He became a prisoner of war during the war.
There is an international treaty regarding the treatment of prisoners of war.
prisoner-of-war camp; POW camp
Composed of 俘 (captive) and 虜 (captive, prisoner). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning 'prisoner of war'.