Cressida Syllabification: (Cres·si·da)Pronunciation: /ˈkresədə/Definition of Cressida (in medieval legends of the Trojan War) the daughter of Calchas, a priest. She was unfaithful to her lover Troilus, a son of Priam. Cressida in other Oxford dictionaries Definition of Cressida in the British & World English dictionary