Added 9 October 2026 guinness noun Categories: PeopleFood & DrinkRare Words noun ! Definition from WordNet 3.1, Princeton University. More about guinness at Wordnik → Where our words come from → English stage and screen actor noted for versatility (1914-2000). A kind of bitter stout. Related Words: mcguinnessgrattanalecmcguinessguineyirisho'guinno'guingallaghergallagergaughangannon Back to today's word