A kind of willow, Salix viminalis, growing in wet places in Europe and Asia, and introduced into North America. It is considered the best of the willows for wickerwork (basketweaving with wicker). The name is sometimes given to any kind of willow.

(poetic) Covered or adorned with osiers.

plural of osier

A surname from French.

plural of Osier

Cornus sericea, native to northern North America.

plural of red osier dogwood

An osier bed.

plural of osiery

Resembling or characteristic of an osier.