One who follows the business of navigating ships or other vessels; one who understands the practical management of ships; one of the crew of a vessel; a mariner; a common seaman. Syn. -- Mariner; seaman; seafarer. Sailor's choice. (Zoöl.) (a) An excellent marine food fish (Diplodus, or Lagodon, rhomboides) of the Southern United States; -- called also porgy, squirrel fish, ...