The Collaborative International Dictionary of English v.0.48:
Vermuth \Ver"muth\, n. [F. vermout.] A liqueur made of white wine, absinthe, and various aromatic drugs, used to excite the appetite. [Written also vermouth.] [1913 Webster]WordNet (r) 3.0 (2006):
vermouth n 1: any of several white wines flavored with aromatic herbs; used as aperitifs or in mixed drinks