from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Nautical A very experienced sailor.
  • noun A seal or a similar marine mammal.

from The Century Dictionary.

  • noun In meteorology, the solar halo seen in the mist and fog near the surface of the sea opposite the sun.
  • noun The harbor-seal, Phoca vitulina; the sea-calf; also (in California), one of the eared seals, Zalophus californianus. See cuts under Phoca and Zalophus.
  • noun The dog-fish, Squalus acanthias, a kind of shark.
  • noun A sailor who has been long afloat; an old sailor.
  • noun A pirate; a privateer.
  • noun In heraldry, a bearing representing a beast nearly like a talbot or alan, but with the addition of a tail like that of a triton, and sometimes with a sort of serrated fin along the back, continued down the tail. The body is covered with scales.

from the GNU version of the Collaborative International Dictionary of English.

  • (Zoöl.) The dogfish.
  • The common seal.
  • colloq. An old sailor; a salt.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Alternative spelling of seadog.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a man who serves as a sailor


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  • Robert Louis Stevenson's Treasure Island opens with the chapter “The Old Sea-Dog at the Admiral Benbow�? and provides a lengthy description of the main character, Long John Silver, who was indeed an experienced sailor, though hardly a model citizen.

    July 27, 2009