any of numerous trees or shrubs of the genus Ilex, as I. opaca(American holly), the state tree of Delaware, or I. aquifolium(English holly), having glossy, spiny-toothed leaves, small, whitish flowers, and red berries.
2.
the foliage and berries, used for decoration, especially during the Christmas season.
Origin: before 1150; Middle English holi(e), holyn,Old English hole(g)n; cognate with Welsh celyn,Irish cuillean; akin to Dutch, German hulst,French houx (< Old High German hulis)