- a soft, lightweight, loosely woven woolen cloth with a slightly napped surface
- cotton flannel
- trousers, etc. made of light flannel
- heavy woolen underwear
Origin of flannelMiddle English akin to or ; from flanen ; from Welsh gwlanen ; from gwlan, wool ; from Indo-European base an unverified form wel-, hair, wool
- A soft woven cloth of wool or a blend of wool and cotton or synthetics.
- flannelsa. Outer clothing, especially pants, made of this cloth.b. Underclothing made of this cloth.
Origin of flannelMiddle English, a kind of woolen cloth or garment, perhaps variant of flanyn, sackcloth, probably from Old French flaine, a kind of coarse wool.
(countable and uncountable, plural flannels)
- (uncountable) A soft cloth material woven from wool, possibly combined with cotton or synthetic fibers.
- With the weather turning colder, it was time to dig out our flannel sheets and nightclothes.
- (New Zealand, UK) A washcloth.
- (slang) Soothing plausible untruth and half truth, claptrap - "Don't talk flannel" 
- made of flannel
(third-person singular simple present flannels, present participle flanneling, simple past and past participle flanneled)
- to rub with a flannel
- to flatter; suck up to