The Collaborative International Dictionary of English v.0.48:
Muffle \Muf"fle\, v. t. [imp. & p. p. Muffled; p. pr. & vb. n.
Muffling.] [Cf. F. moufle a mitten, LL. muffula, OD. moffel
a muff. See Muff.]
1. To wrap up in something that conceals or protects; to
wrap, as the face and neck, in thick and disguising folds;
hence, to conceal or cover the face of; to envelop; to
inclose; -- often with up. --South.
The face lies muffled up within the garment.
He muffled with a cloud his mournful eyes. --Dryden.
Muffled up in darkness and superstition.
2. To prevent seeing, or hearing, or speaking, by wraps bound
about the head; to blindfold; to deafen.
3. To wrap or fit with something that dulls or deadens the
sound of; as, to muffle the strings of a drum, or that
part of an oar which rests in the rowlock; to muffle the
exhaust of a motor vehicle.