The Collaborative International Dictionary of English v.0.48:

Decant \De*cant"\, v. t. [imp. & p. p. Decanted; p. pr. & vb.
   n. Decanting.] [F. d['e]canter (cf. It. decantare), prop.,
   to pour off from the edge of a vessel; pref. d['e]- (L. de) +
   OF. cant (It. canto) edge, border, end. See Cant an edge.]
   To pour off gently, as liquor, so as not to disturb the
   sediment; or to pour from one vessel into another; as, to
   decant wine.
   [1913 Webster]

WordNet (r) 3.0 (2006):

decant
    v 1: pour out; "the sommelier decanted the wines" [syn:
         decant, pour, pour out]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "decant":
   bail, bleed, blow out, broach, bucket, cast forth, cup, debouch,
   dip, discharge, disembogue, disgorge, dish, dish out, dish up,
   draft, draft off, drain, draw, draw from, draw off, ejaculate,
   empty, eruct, erupt, exhaust, expel, extravasate, fork, jet, ladle,
   let, let blood, let out, milk, outpour, phlebotomize, pipette,
   pour, pour forth, pour out, pump, pump out, scoop, send forth,
   send out, shovel, siphon off, spade, spew, spoon, spout, spurt,
   squirt, suck, suck out, tap, throw out, venesect