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Mustard (condiment), a thick paste made from mustard seeds used as a condiment

Mustard greens, a green vegetable (Brassica juncea)

Mustard oil, oil produced from mustard seeds

Mustard plants, whose seeds are used for the condiment

Mustard seeds, seeds of the mustard plant used in cooking

Mustard (color), a shade of yellow, similar to the color of the condiment

Sulfur mustards, a class of chemical weapons, of which mustard gas is a member

MUSTARD, an acronym for an experimental spacecraft design

Mustard (album) by Roy Wood