corsair /kɔːɹsɛəɹ/ noun5 •A French privateer, especially from the port of Saint-Malo. •A privateer or pirate in general. •The ship of such privateers or pirates, especially of French nationality. •A nocturnal assassin bug of the genus Rasahus, found in the southern USA. •A Californian market fish (Sebastes rosaceus). formscorsairs