A murmur is a quiet, blurred sound often heard from a distance. It can be comforting when you're little to fall asleep listening to the murmur of your parents talking downstairs.

Murmur can also be a verb that means the same as mutter: you say something so quietly that your words can't be understood. You might be complaining about something — a murmur is often a sign that someone's not pleased. A heart murmur is an abnormal heart sound that can only be detected by a doctor with a stethoscope, it's so low and soft.

Definitions of murmur
  1. noun
    a low continuous indistinct sound; often accompanied by movement of the lips without the production of articulate speech
    synonyms: murmuration, murmuring, mussitation, mutter, muttering
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    type of:
    the sudden occurrence of an audible event
  2. noun
    an abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves
    synonyms: cardiac murmur, heart murmur
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    systolic murmur
    a murmur heard during systole
    type of:
    (medicine) any sensation or change in bodily function that is experienced by a patient and is associated with a particular disease
  3. noun
    a complaint uttered in a low and indistinct tone
    synonyms: grumble, grumbling, murmuring, mutter, muttering
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    type of:
    an expression of grievance or resentment
  4. verb
    speak softly or indistinctly
    “She murmured softly to the baby in her arms”
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    speak softly or lovingly
    issue soft noises
    type of:
    mouth, speak, talk, utter, verbalise, verbalize
    express in speech
  5. verb
    make complaining remarks or noises under one's breath
    synonyms: croak, gnarl, grumble, mutter
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    type of:
    complain, kick, kvetch, plain, quetch, sound off
    express complaints, discontent, displeasure, or unhappiness
  6. noun
    a schwa that is incidental to the pronunciation of a consonant
    synonyms: murmur vowel
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    type of:
    schwa, shwa
    a neutral middle vowel; occurs in unstressed syllables
Word Family

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