mustard.
A plant of certain species of the genus Brassica, or of related genera (especially Sinapis alba, in the family Brassicaceae, with yellow flowers, and linear seed pods).
Meaning & usage
A plant of certain species of the genus Brassica, or of related genera (especially Sinapis alba, in the family Brassicaceae, with yellow flowers, and linear seed pods).
Powder or paste made from seeds of the mustard plant, and used as a condiment or a spice.
When the waitress brought the food, I asked whether she had any Dijon mustard.
He loved having mustard and toast for breakfast.
The leaves of the mustard plant, used as a salad.
Mustard and cress sandwiches.
Dark yellow colour, the colour of mustard.
One of a family of vesicants containing one or more 2-chloroethyl (C₂H₄Cl) groups, commonly used in chemical warfare and cancer chemotherapy.
The tomalley of a crab, which resembles the condiment.
Ellipsis of mustard gas.
Energy, power (when throwing a baseball).
Where this word comes from
From Middle English mustard, from Old French moustarde (French moutarde), from moust (“must”), from Latin mustum. Compare Saterland Frisian Muster (“mustard”), Dutch mosterd (“mustard”), German Low German Musterd (“mustard”), Icelandic mustarður (“mustard”). Displaced Middle English senep, from Old English senep, from Latin sināpi (“mustard”). Sometimes mistakenly thought to come from Latin mustum ardens, but such a Latin phrase is not attested, and it is well understood that that the final -ard is derived from Old French -arde. Doublet of mostarda.
Of a dark yellow colour.
Very good, or very skilled.
Where this word comes from
From Middle English mustard, from Old French moustarde (French moutarde), from moust (“must”), from Latin mustum. Compare Saterland Frisian Muster (“mustard”), Dutch mosterd (“mustard”), German Low German Musterd (“mustard”), Icelandic mustarður (“mustard”). Displaced Middle English senep, from Old English senep, from Latin sināpi (“mustard”). Sometimes mistakenly thought to come from Latin mustum ardens, but such a Latin phrase is not attested, and it is well understood that that the final -ard is derived from Old French -arde. Doublet of mostarda.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.