Lewis Short
(verb) : murmŭro, āvi, ātum, 1, and (ante- and post-class.) murmŭror, ātus, 1, id.
* To murmur, mutter; to rustle, rumble, roar, etc. (cf.: susurro, musso, fremo, strepo).
* Neutr.
* Form murmuro: secum murmurat,Plaut. Aul. 1, 1, 13; Varr. L. L. 6, § 67 Müll.—Of discontented persons, to mutter, grumble: servi murmurant,Plaut. Mil. 3, 1, 149: et murmuravit omnis congregatio,Vulg. Exod. 16, 2 al.—Of the nightingale: secum ipse murmurat,Plin. 10, 29, 43, § 82: magia carminibus murmurata,muttered,App. Mag. p. 304, 28.—Of inanimate things, to murmur, roar, rumble: murmurantia litora,Varr. L. L. 6, § 67 Müll.: murmurans mare,Cic. Tusc. 5, 40, 116: unda,Verg. A. 10, 212: ignis,crackles,Plin. 18, 35, 84, § 357: intestina,to rumble,Plaut. Cas. 4, 3, 6.
* Act., transf., to mutter or grumble at a thing: quidam tarditatem poëtae murmurari,App. Flor. p. 353 fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary