v. i.

  1. A low, confused, and indistinct sound, like that of running water.
  2. A complaint half suppressed, or uttered in a low, muttering voice.
  3. To make a low continued noise, like the hum of bees, a stream of water, distant waves, or the wind in a forest.
  4. To utter complaints in a low, half-articulated voice; to feel or express dissatisfaction or discontent; to grumble; -- often with at or against.

v. t.

  1. To utter or give forth in low or indistinct words or sounds; as, to murmur tales.