to wrap with something to deaden or prevent sound: to muffle drums.
to deaden (sound) by wrappings or other means.
to wrap or envelop in a cloak, shawl, coat, etc., especially to keep warm or protect the face and neck (often followed by up): Muffle up the children before they go out.
to wrap (oneself) in a garment or other covering: muffled in silk.
to alter temporarily the profile of (a plaster mold) in order to run a base coat of plaster that will later be covered by a finish coat having the true profile.