Definition of orache
- a plant of the goosefoot family with leaves that are sometimes covered in a white mealy substance. Several kinds are edible and can be used as a substitute for spinach or sorrel.
- Genus Atriplex, family Chenopodiaceae: several species, in particular the common orache (A. hortensis), which is cultivated in some areas
Middle English orage, from Anglo-Norman French arasche, from Latin atriplex, from Greek atraphaxus