Simple Definition of mutter
: to speak quietly so that it is difficult for other people to hear what you say
: to complain in a quiet or indirect way
Full Definition of mutter
1 : to utter sounds or words indistinctly or with a low voice and with the lips partly closed
2 : to murmur complainingly or angrily : grumble
: to utter especially in a low or imperfectly articulated manner
Examples of mutter
She angrily muttered something about her bad luck.
She sat practicing her speech, muttering to herself.
Some employees are muttering about the changes in the pension plan.
Origin of mutter
Middle English muteren, of imitative origin
First Known Use: 14th century
MUTTER Defined for Kids
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