OSIER Meaning of OSIER in English [ 'əʊzɪə ]■ noun a small willow of damp habitats with long flexible shoots used in basketwork. [ Salix viminalis .] ↘a willow shoot.OriginME: from OFr.; cf. med. L. auseria '~ bed'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004