1. (noun)cobnut, filbert, Corylus avellana, Corylus avellana grandis small nut-bearing tree much grown in Europe Synonyms: cobnut, cob, filbert, hazelnut
2. (noun)hazelnut, filbert, cobnut, cob nut of any of several trees of the genus Corylus Synonyms: hazelnut tree, cob, cobnut, hazelnut, great black-backed gull, filbert, black-backed gull, hazel