1. Talk indistinctly, usually in a low voice
   "He mumbled to himself while reading the document";
   - mutter, maunder, mussitate [archaic]
    
2. Grind with the gums; chew without teeth and with great difficulty
   "the old man had no teeth left and mumbled his food";
   - gum

1. A soft indistinct utterance
   "His mumble was barely audible in the noisy room"

Derived forms: mumbles, mumbled, mumbling

Type of: chew, manducate [archaic], masticate, mouth, speak, talk, utter, utterance, verbalise [Brit], verbalize, vocalization

Encyclopedia: Mumble