- 1a thick, cold, yellow or brown sauce that tastes hot and spicy and is usually eaten with meat a jar of mustard mustard powder French/English mustard
- 2a small plant with yellow flowers, grown for its seeds that are crushed to make mustard
- 3a brown-yellow color Idioms
to (not) be as good as expected or required I didn't cut the mustard as a hockey player.
a mustard sweaterSee mustard in the Oxford Advanced Learner's Dictionary
Check pronunciation: mustard