A shrub or small tree of the genus Corylus, as the C. avellana, bearing a nut containing a kernel of a mild, farinaceous taste; the filbert. The American species are C. Americana, which produces the common hazelnut, and C. rostrata. See Filbert.
- Any of various shrubs or small trees of the genus Corylus, especially the European species C. avellana or the American species C. americana, bearing edible nuts enclosed in a leafy husk. Also called filbert.
- A hazelnut.
- A light brown or yellowish brown.