noun
formal dinner; banquet
Refers to a formal Western-style meal, often with multiple courses and a set seating arrangement. Not used for casual dining or Japanese-style banquets.
大使館で正餐が開かれた。
A formal dinner was held at the embassy.
正餐にはドレスコードがある。
There is a dress code for the formal dinner.
Compound of 正 (formal, proper) and 餐 (meal, dining). The character 餐 is relatively rare and literary, reinforcing the formal register.