banquet 指正式而盛大的宴会或国宴。
feast 指筵席酒席，有时可与banquet换用，但前者强调共享欢乐的气氛。
dinner 普通用词，含义广。本义指一日的主餐，但多用于指宴请客人的正式的一餐。
party 指一般的社交聚会，也引申指宴请或宴会。
参考例句
1. We banqueted the visiting president in grand style. 我们举行盛宴，欢迎来访的总统。
2. When would you like your banquet? 琼小姐，宴会订在什么时候？
3. He ushered at the banquet. 他在宴会上当引导员。
英英解释
n.
1. a ceremonial dinner party for many people
2. a meal that is well prepared and greatly enjoyed v.
1. provide a feast or banquet for
2. partake in a feast or banquet
