1 [intransitive and transitive]
to say something in a soft quiet voice that is difficult to hear clearly:
'Well done,' murmured George.
The girl murmured something polite, and smiled.
Julie turned over and murmured in her sleep.
to make a soft, low sound:
The wind murmured through the trees.
3 [intransitive + against] literary especially British English
to complain to friends and people you work with, but not officially
—murmuring noun [uncountable and countable]
murmurings of discontent