- any of several aromatic herbs belonging to the genus Origanum, of the mint family, especially O. majorana(sweet marjoram ), having leaves used as seasoning in cooking.
- an aromatic Mediterranean plant, Origanum (or Marjorana) hortensis, with small pale purple flowers and sweet-scented leaves, used for seasoning food and in salads: family Lamiaceae (labiates)
- a similar and related European plant, Origanum vulgare
