Merriam-Webster's Collegiate® Dictionary, 11th Edition
FUR
I. verb (furred; furring)
Etymology: Middle English furren, from Anglo-French furrer to stuff, fill, line, from fuerre sheath, of Germanic origin; akin to Old High German fuotar sheath; akin to Greek pōma lid, cover, Sanskrit pāti he protects
Date: 14th century
transitive verb to cover, line, trim, or clothe with fur, to coat or clog as if with fur, to apply furring to, intransitive verb to become coated or clogged as if with fur,
II. noun
Usage: often attributive
Date: 14th century
a piece of the dressed pelt of an animal used to make, trim, or line wearing apparel, an article of clothing made of or with fur, the hairy coat of a mammal especially when fine, soft, and thick, a coating resembling fur: as, a coat of epithelial debris on the tongue, the thick pile of a fabric (as chenille), furless adjective
III. abbreviation furlong