The Collaborative International Dictionary of English v.0.48:

Brent \Brent\, Brant \Brant\, a. [AS. brant; akin to Dan. brat,
   Icel. brattr, steep.]
   1. Steep; high. [Obs.]
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            Grapes grow on the brant rocks so wonderfully that
            ye will marvel how any man dare climb up to them.
                                                  --Ascham.
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   2. Smooth; unwrinkled. [Scot.]
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            Your bonnie brow was brent.           --Burns.
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The Collaborative International Dictionary of English v.0.48:

Brand goose \Brand" goose`\ [Prob. fr. 1st brand + goose: cf.
   Sw. brandg[*a]s. Cf. Brant.] (Zool.)
   A species of wild goose (Branta bernicla) usually called in
   America brant. See Brant.
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The Collaborative International Dictionary of English v.0.48:

Brant \Brant\ (br[a^]nt), n. [Cf.Brand goose, Brent,
   Brenicle.] (Zool.)
   A species of wild goose (Branta bernicla) -- called also
   brent and brand goose. The name is also applied to other
   related species.
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The Collaborative International Dictionary of English v.0.48:

Brant \Brant\, a. [See Brent.]
   Steep. [Prov. Eng.]
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WordNet (r) 3.0 (2006):

brant
    n 1: small dark geese that breed in the north and migrate
         southward [syn: brant, brant goose, brent, brent
         goose]