1 a meal (usually at a party or a special occasion) at which food is placed on a long table and people serve themselves 自助餐: Lunch was a cold buffet. 午饭吃的是自助冷餐。a buffet lunch 自助午餐

2 part of a train where passengers can buy food and drinks; a cafe at a station （火车上的）餐车；（火车站的）小餐馆