Definition of "weazen"

Marry, come up, say I — what a plague — does an old weazen think that tender lasses are to be bought like pullets o' a market day?

1883, Howard Pyle, The Merry Adventures of Robin Hood […], New York, N.Y.: […] Charles Scribner’s Sons […]

It was not merely that they were weazen and shrivelled—though they were certainly that too—but they looked absolutely ferocious with discontent.

1852 March – 1853 September, Charles Dickens, Bleak House, London: Bradbury and Evans, […], published 1853