Source : Webster's Revised Unabridged Dictionary (1913)

Brant \Brant\ (br[a^]nt), n. [Cf.{Brand goose}, {Brent},
   {Brenicle}.] (Zo["o]l.)
   A species of wild goose ({Branta bernicla}) -- called also
   {brent} and {brand goose}. The name is also applied to other
   related species.

Brant \Brant\, a. [See {Brent}.]
   Steep. [Prov. Eng.]

Brent \Brent\, Brant \Brant\, a. [AS. brant; akin to Dan. brat,
   Icel. brattr, steep.]
   1. Steep; high. [Obs.]

            Grapes grow on the brant rocks so wonderfully that
            ye will marvel how any man dare climb up to them.
                                                  --Ascham.

   2. Smooth; unwrinkled. [Scot.]

            Your bonnie brow was brent.           --Burns.

Source : WordNet®

brant
     n : small dark geese that breed in the north and migrate
         southward [syn: {brant goose}, {brent}, {brent goose}]
     [also: {brants} (pl)]