Collins English-English Dictionary

mustard ['m^stəd]

1. 1. n any of several Eurasian plants of the genus Brassica, esp black mustard and white mustard, having yellow or white flowers and slender pods and cultivated for their pungent seeds: family Brassicaceae (crucifers) - See also charlock

2. 2. n a paste made from the powdered seeds of any of these plants and used as a condiment

3. 3. n

4. 4. n a brownish-yellow colour

5. 5. n (as adjective)

   a mustard carpet

6. 6. n [slang] [chiefly US] zest or enthusiasm

7. 7. n [Etymology] C13: from Old French moustarde, from Latin mustum must², since the original condiment was made by adding must