(uncountable) A soft cloth material originally woven from wool, today often combined with cotton or synthetic fibers.
(New Zealand, Britain, countable) A washcloth.
(US, countable) A flannel shirt.
(slang, uncountable) Soothing, plausible untruth or half-truth; claptrap.
(transitive) To rub with a flannel.
(transitive) To wrap in flannel.
(transitive) To flatter; to suck up to.
(transitive, slang) To waffle or prevaricate.
Made of flannel.