Source : Webster's Revised Unabridged Dictionary (1913)

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.
                                                  --Addison.

            He muffled with a cloud his mournful eyes. --Dryden.

            Muffled up in darkness and superstition.
                                                  --Arbuthnot.

   2. To prevent seeing, or hearing, or speaking, by wraps bound
      about the head; to blindfold; to deafen.

   3. To wrap 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.