Definition of: mumble

(mum′bəl) v.t. & v.i. ·bled, ·bling
1. To speak or utter in low, indistinct tones; mutter.
2. Rare To chew slowly and ineffectively, as with toothless gums.
—noun A low, mumbling speech; mutter. [ME momelen, freq. of obs. mum make inarticulate sounds. Cf. G mummeln.]
—mum′bler noun
—mum′bling adjective
—mum′bling·ly adverb