1.
banquet; celebration feast; festive banquet
A formal meal or feast held to celebrate a happy occasion such as a wedding, promotion, or other milestone. More formal than a casual party.
祝宴を開く。
To hold a celebration banquet.
結婚式の後に盛大な祝宴が催された。
A grand banquet was held after the wedding ceremony.
優勝を記念して、チーム全員を招いた祝宴が行われた。
A celebration banquet was held for the entire team to commemorate the championship victory.
Common collocations: 祝宴を開く (to hold a banquet), 祝宴を催す (to host a banquet), 祝宴に招かれる (to be invited to a banquet). A formal, literary word; everyday speech more commonly uses お{祝いの会} or パーティー. Related: 宴会 (banquet — more general, not necessarily celebratory), 披露宴 (wedding reception — specifically for weddings), 饗宴 (feast — literary).