Fondue (UK: , US: , French: [fɔ̃dy]) is a Swiss melted cheese and wine dish served in a communal pot (caquelon or fondue pot) over a portable stove (réchaud) heated with a candle or spirit lamp, and eaten by dipping bread into the cheese using long-stemmed forks. It was promoted as a Swiss national dish by the Swiss Cheese Union (Schweizerische Käseunion) in the 1930s, and was popularized in North America in the 1960s.

Since the 1950s, the term "fondue" has been generalized to other dishes in which a food is dipped into a communal pot of liquid kept hot in a fondue pot: chocolate fondue, fondue au chocolat, in which pieces of fruit or pastry are dipped into a melted chocolate mixture, and fondue bourguignonne, in which pieces of meat are cooked in hot oil or broth.