To make a low continuous noise, like the sound of rushing water or of the wind among trees, or like the hum of bees.
To utter words indistinctly; mutter.
To grumble; complain; utter complaints in a low, muttering voice; hence, in general, to express complaint or discontent: with at or against.
Synonyms To repine, whimper.
To utter indistinctly; say in a low indistinct voice; mutter.
noun.
A low sound continued or continuously repeated, as that of a stream running in a stony channel, of a number of persons talking indistinctly in low tones, and the like; a low and confused or indistinct sound; a hum.
noun.
A muttered complaint or protest; the expression of dissatisfaction in a low muttering voice; hence, any expression of complaint or discontent.
noun.
In medicine, any one of various sounds, normal and pathological, heard in auscultation.