1mur·mur 
/ˈmɚmɚ/ noun
plural mur·murs /ˈmɚmɚ/ noun 1 [count] a : a low sound made when many people are speaking
▪ a murmur of voices ▪ the murmur of the crowd
b : a quiet expression of an opinion or feeling
▪ The suggestion brought murmurs of disapproval. ▪ a murmur of agreement/protest ▪ murmurs of recognition ▪ They accepted the decision without a murmur (of protest/complaint). [=they accepted the decision without protesting/complaining at all]
c : speech or a way of speaking that is quiet and soft
▪ He spoke in a murmur. ▪ They spoke to each other in murmurs. 2 [singular] : a low, quiet, and continuous sound
▪ a murmur of bees ▪ the murmur of the waves along the shore 3 [count] medical : an unusual heart sound that may indicate a problem with the heart's function or structure — usually singular ▪ Her doctor detected a (heart) murmur during a routine physical exam.
▪ a murmur of voices ▪ the murmur of the crowd
b : a quiet expression of an opinion or feeling
▪ The suggestion brought murmurs of disapproval. ▪ a murmur of agreement/protest ▪ murmurs of recognition ▪ They accepted the decision without a murmur (of protest/complaint). [=they accepted the decision without protesting/complaining at all]
c : speech or a way of speaking that is quiet and soft
▪ He spoke in a murmur. ▪ They spoke to each other in murmurs.
▪ a murmur of bees ▪ the murmur of the waves along the shore
