Muff (mŭf), n. [Cf. LG. muff, D. mof, G., Dan., & Sw. muff, F. moufle mitten, LL. muffula, MHG. mouwe sleeve, D. mouw, and E. muffle, v.] 1. A soft cover of cylindrical form, usually of fur, worn by women to shield the hands from cold.
2. (Mech.) A short hollow cylinder surrounding an object, as a pipe.
3. (Glass Manuf.) A blown cylinder of glass which is afterward flattened out to make a sheet.
4. [Perhaps a different word; cf. Prov. E. maffle to slammer.] A stupid fellow; a poor-spirited person. “A muff of a curate.” Thackeray.
5. (Baseball) A failure to hold a ball when once in the hands.
6. (Zoöl.) The whitethroat.