n. & v.
n. 1 a subdued continuous sound, as made by waves, a brook, etc. 2 a softly spoken or nearly inarticulate utterance. 3 Med. a recurring sound heard in the auscultation of the heart and usu. indicating abnormality. 4 a subdued expression of discontent.
v. 1 intr. make a subdued continuous sound. 2 tr. utter (words) in a low voice. 3 intr. (usu. foll. by at, against) complain in low tones, grumble. murmurer n. murmuringly adv. murmurous adj.
[ ME f. OF murmurer f. L murmurare: cf. Gk mormuro (of water) roar, Skr. marmaras noisy ]