"a continuous. low, indistinct noise," late 14c., verbal noun from murmur (v.).
Entries linking to murmuring
murmur v.
late 14c., "make a low continuous noise; grumble, complain," from Old French murmurer "murmur, grouse, grumble" (12c.), from murmur "rumbling noise" (see murmur (n.)). Transitive sense of "say indistinctly" is from 1530s. Related: Murmured; murmuring.