A sandwich is a food typically consisting of vegetables, sliced cheese or meat, placed on or between slices of bread, or more generally any dish wherein bread serves as a container or wrapper for another food type. The bread may be plain or be coated with condiments, such as mayonnaise or mustard, to enhance its flavor and texture. As well as being homemade, sandwiches are also widely sold in restaurants and can be served hot or cold.

The sandwich began as a portable finger food in the Western world, though over time it has become prevalent worldwide. The 3rd of November marks the National Sandwich Day. Sandwiches are a popular type of lunch food, taken to work, school, or picnics to be eaten as part of a packed lunch. There are both savory sandwiches, such as deli meat sandwiches, and sweet sandwiches, such as a peanut butter and jelly sandwich.