Source : Webster's Revised Unabridged Dictionary (1913)

Gash \Gash\ (g[a^]sh), v. t. [imp. & p. p. {Gashed} (g[a^]sht);
   p. pr. & vb. n. {Gashing}.] [For older garth or garse, OF.
   garser to scarify, F. gercer to chap, perh. from an assumed
   LL. carptiare, fr. L. carpere, carptum, to pluck, separate
   into parts; cf. LL. carptare to wound. Cf. {Carpet}.]
   To make a gash, or long, deep incision in; -- applied chiefly
   to incisions in flesh.

         Grievously gashed or gored to death.     --Hayward.

Gash \Gash\, n.
   A deep and long cut; an incision of considerable length and
   depth, particularly in flesh.

Source : WordNet®

gash
     n 1: a wound made by cutting; "he put a bandage over the cut"
          [syn: {cut}, {slash}, {slice}]
     2: a trench resembling a furrow that was made by erosion or
        excavation [syn: {cut}]
     3: a strong sweeping cut made with a sharp instrument [syn: {slash}]

gash
     v : cut open; "she slashed her wrists" [syn: {slash}]