adj : making a low continuous indistinct sound; "like murmuring
waves"; "susurrant voices" [syn: susurrant, whispering]
n 1: a low continuous indistinct sound; often accompanied by
movement of the lips without the production of
articulate speech [syn: mutter, muttering, murmur, murmuration, mussitation]
2: a complaint uttered in a low and indistinct tone [syn: grumble, grumbling, murmur, mutter, muttering]