Emily Dickinson Lexicon

MUR'MUR, n. [L. See the verb.]

1. A low sound continued or continually repeated, as that of a stream running in a stony channel, or that of flame. Black melancholy sits, / Deepens the murmur of the falling floods, / And breathes a browner horror on the woods. Pope.
2. A complaint half suppressed, or uttered in a low, muttering voice. Some discontents there are, some idle murmurs. Dryden.