- a cultivated plant, Armoracia rusticana, of the mustard family, having small, white flowers.
- the pungent root of this plant, ground and used as a condiment and in medicine.
- the condiment itself, sometimes moistened with vinegar or mixed with ground beets.
- of or containing ground horseradish as a flavoring: brisket of beef with horseradish sauce.
- a coarse Eurasian plant, Armoracia rusticana, cultivated for its thick white pungent root: family Brassicaceae (crucifers)
- the root of this plant, which is ground and combined with vinegar, etc, to make a sauce
