Definition of Banquet in the Definitions.net dictionary. Meaning of Banquet. What does Banquet mean? Information and translations of Banquet in the most comprehensive dictionary definitions resource on the web. Definition of banquet noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. BANQUET meaning: a formal dinner for many people usually to celebrate a special event often used before another noun Define banquet. banquet synonyms, banquet pronunciation, banquet translation, English dictionary definition of banquet. lavish meal; feast; ceremonious dinner: The awards were followed by a banquet.