guinness/ˈɡɪnɪs/EtymologyAn Anglicization of an Irish patronymic surname based on Angus.nameA surname from Irish.A brand of dark stout beer from Ireland, one of the most widely recognised brands of beer in the world, named for Arthur Guinness who first brewed it.Guinness World Records.nounA serving of the beverage.“Three Guinnesses please, barman.”