n. 1 gratuity, baksheesh, pourboire, douceur, lagniappe or lagnappe, present, gift, Colloq little something That waiter didn't deserve a tip 2 tip-off, (inside) information, warning, advice, suggestion, clue, hint, pointer, forecast, prediction, Colloq Brit gen Louie had a tip that the police were coming Her tip was 'Flapdoodle' to win the fifth race.
v. 3 reward Why did you tip the barmaid? 4 Usually, tip off advise, warn, caution, alert, forewarn, notify, let (someone) know, Colloq let (someone) in on The thieves were tipped off and never arrived