A mariner is someone who works on a boat or ship. A lobsterman who works alone on a small boat is a mariner, and so is the captain of an enormous cargo ship.

Mariner is a somewhat old-fashioned word for a sailor or seafarer, a person who spends most of their working life on some kind of ocean vessel. Today, you're more likely to read about mariners in an old book than to meet people who describes themselves this way. Mariner comes from the Latin word marinus, "of the sea," and its root, mare, "the sea."

Definitions of mariner
  1. noun
    a person who serves as a sailor
    synonyms: Jack, Jack-tar, gob, old salt, sea dog, seafarer, seaman, tar
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    able seaman, able-bodied seaman
    a seaman in the merchant marine; trained in special skills
    bo's'n, bo'sun, boatswain, bos'n, bosun
    a petty officer on a merchant ship who controls the work of other seamen
    deckhand, roustabout
    a member of a ship's crew who performs manual labor
    helmsman, steerer, steersman
    the person who steers a ship
    bargee, bargeman, lighterman
    someone who operates a barge
    officer, ship's officer
    a person authorized to serve in a position of authority on a vessel
    a person qualified to guide ships through difficult waters going into or out of a harbor
    sea lawyer
    an argumentative and contentious seaman
    a seaman who works on a ship that hunts whales
    cox, coxswain
    the helmsman of a ship's boat or a racing crew
    captain, master, sea captain, skipper
    an officer who is licensed to command a merchant ship
    first mate, mate
    the officer below the master on a commercial ship
    privateer, privateersman
    an officer or crew member of a privateer
    an officer aboard a ship who keeps accounts and attends to the passengers' welfare
    navigator, sailing master
    the ship's officer in charge of navigation
    the ship's officer who is in charge of provisions and dining arrangements
    an officer on a merchant ship in charge of the cargo and its sale and purchase
    type of:
    crewman, sailor
    any member of a ship's crew
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