A Quick and Simple Dictionary

murmur

1. Noun.  (countable) Low or indistinct sounds or speech.
2. Noun.  (medicine) The sound made by any condition which produces noisy, or turbulent, flow of blood through the heart.
3. Noun.  A muttered complaint or protest; the expression of dissatisfaction in a low muttering voice; any expression of complaint or discontent.
4. Verb.  (intransitive, now) To grumble; to complain in a low, muttering voice, or express discontent (term, at) or (term, against) someone or something. (defdate, from 14th c.) .
5. Verb.  (intransitive) To speak or make low, indistinguishable noise; to mumble, mutter. (defdate, from 14th c.) .
6. Verb.  (transitive) To say (something) indistinctly, to mutter. (defdate, from 15th c.) .