FILBERT Meaning of FILBERT in English n.1 the cultivated hazel, Corylus maxima, bearing edible ovoid nuts. 2 this nut. Etymology: ME philliberd etc. f. AF philbert, dial. F noix de filbert, a nut ripe about St Philibert's day (20 Aug.) Oxford English vocab. Оксфордский английский словарь. 2012