From Longman Dictionary of Contemporary Englishmuttermut‧ter /ˈmʌtə $ -ər/ ●●○ verb 1 [intransitive, transitive]SAY to speak in a low voice, especially because you are annoyed about something, or you do not want people to hear youmutter to yourself ‘I never want to come here again, ’ he muttered to himself. Elsie muttered something I couldn’t catch and walked off. ‘He’s such an unpleasant man, ’ Alyssia muttered under her breath.mutter about What are you two muttering about?► see thesaurus at say2 [intransitive]COMPLAIN to complain about something or express doubts about it, but without saying clearly and openly what you thinkmutter about Some senators muttered darkly about the threat to national security. —mutter noun [singular] His voice subsided to a mutter. —muttering noun [countable, uncountable] The mutterings about his leadership continued to grow.→ See Verb table
Examples from the Corpus
mutter• ""Why do I have to do all the work?'' she muttered.• "Sometimes she is such a pain, " Jake muttered.• There has been much muttering among the aggrieved franchisees about the possibility of legal action.• They muttered comments and corrections to each other.• Grant went out, muttering something about having to see a client.• I muttered something about helping and followed her out.• They both muttered something about homework and walked away.• Sometimes her lips moved and she muttered something in a low tone.• He muttered something inaudible and withdrew.• He was always muttering to himself about all the experiments he had to do that week.• He was always muttering to himself about all the experiments he had to do that week.mutter to yourself• He seemed to be muttering to himself.• Then El-Jorr wrenched open the door and, ignoring everybody, left as abruptly as he had arrived, muttering to himself.• Nakki muttered to herself about crooks and thieves.• Where possible he would seize scraps of parchment and draw lines, muttering to himself and scratching his head.• His stepfather was lying on his back, muttering to himself, his eyes oddly fixed, staring up at the ceiling.• Damn Julius! she muttered to herself in a great surge of resentment.• While she was muttering to herself, she was emptying drawers and cupboards, and throwing her things into her suitcase.Origin mutter (1300-1400) Probably from the sound 