'Drinker' definitions:

Definition of 'drinker'

From: WordNet
noun
A person who drinks liquids
noun
A person who drinks alcoholic beverages (especially to excess) [syn: drinker, imbiber, toper, juicer] [ant: abstainer, abstinent, nondrinker]

Definition of 'Drinker'

From: GCIDE
  • Drinker \Drink"er\, n. One who drinks; as, the effects of tea on the drinker; also, one who drinks spirituous liquors to excess; a drunkard. [1913 Webster]
  • Drinker moth (Zool.), a large British moth ({Odonestis potatoria}). [1913 Webster]