'Guinness' definitions:

Definition of 'Guinness'

From: WordNet
noun
English stage and screen actor noted for versatility (1914-2000) [syn: Guinness, Alec Guinness, Sir Alec Guinness]
noun
A kind of bitter stout

Definition of 'Guinness'

From: GCIDE
  • Guinness \Guinness\ n. [Trade name.] a kind of bitter stout, also called Guiness' stout; as, a glass of Guinness. [WordNet 1.5]