Source : Webster's Revised Unabridged Dictionary (1913)

Garfish \Gar"fish`\, n. [See {Gar}, n.] (Zo["o]l.)
   (a) A European marine fish ({Belone vulgaris}); -- called
       also {gar}, {gerrick}, {greenback}, {greenbone},
       {gorebill}, {hornfish}, {longnose}, {mackerel guide},
       {sea needle}, and {sea pike}.
   (b) One of several species of similar fishes of the genus
       {Tylosurus}, of which one species ({T. marinus}) is
       common on the Atlantic coast. {T. Caribb[ae]us}, a very
       large species, and {T. crassus}, are more southern; --
       called also {needlefish}. Many of the common names of the
       European garfish are also applied to the American
       species.

Source : WordNet®

garfish
     n : primitive predaceous North American fish covered with hard
         scales and having long jaws with needle-like teeth [syn:
         {gar}, {garpike}, {billfish}, {Lepisosteus osseus}]
     [also: {garfishes} (pl)]