noun, often attributive
\ˈmau̇th \
plural mouths\ˈmau̇t͟hz also ˈmau̇z, ˈmau̇ths; in synecdochic compounds like "blabbermouths" thsmore frequently \

Definition of mouth 

(Entry 1 of 2)

1a : the natural opening through which food passes into the body of an animal and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth

b : grimace made a mouth

c : an individual requiring food had too many mouths to feed

2a : voice, speech finally gave mouth to her feelings

b : mouthpiece sense 3a he is the mouth … of the House in its relations with the Crown— T. E. May

c(1) : a tendency to excessive talk he is not all mouth … he gets resultsTime

(2) : saucy or disrespectful language : impudence just don't take any mouth from him— Jackson Burgess

3 : something that resembles a mouth especially in affording entrance or exit: such as

a : the place where a stream enters a larger body of water

b : the surface opening of an underground cavity (see cavity sense 1) the mouth of a well the mouth of a volcano

c : the opening of a container the mouth of a bottle

d : an opening in the side of an organ flue pipe

down in the mouth


\ˈmau̇t͟h also ˈmau̇th \
mouthed; mouthing; mouths

Definition of mouth (Entry 2 of 2)

transitive verb

1a : speak, pronounce

b : to utter bombastically : declaim

c : to repeat without comprehension or sincerity always mouthing platitudes

d : to form soundlessly with the lips the librarian mouthed the word "quiet"

e : to utter indistinctly : mumble mouthed his words

2 : to take into the mouth especially : eat

intransitive verb

1a : to talk pompously : rant often used with off

b : to talk insolently or impudently usually used with off

2 : to move the mouth especially so as to make faces

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Other Words from mouth


mouthlike \ˈmau̇th-​ˌlīk \ adjective


mouther noun

Synonyms & Antonyms for mouth

Synonyms: Noun

back talk, backchat, cheek, impertinence, impudence, insolence, sass, sauce

Synonyms: Verb

chunter [British], grunt, mumble, murmur, mutter

Antonyms: Verb

speak out, speak up

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Examples of mouth in a Sentence


He kissed her on the mouth. He threatened to punch me in the mouth. She stood there with her mouth agape. I burned the roof of my mouth. They told him to keep his mouth closed when chewing and not to talk with his mouth full. He wiped his mouth with a napkin after eating. She regretted saying it as soon as the words were out of her mouth. The smell of the food made my mouth water. The candy melts in your mouth. The medication is taken by mouth.


She was just mouthing the usual meaningless platitudes about the need for reform. silently mouthing the words to a song
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Recent Examples on the Web: Noun

Yuskavage headed straight to her studio and painted The Ones That Shouldn’t: The Gifts, which shows a young woman bound, breasts exposed, with frosted flowers stuffed in her mouth. Thomas Gebremedhin, WSJ, "Lisa Yuskavage’s Art Continues to Defy Characterization," 6 Nov. 2018 Many of Italy’s illustrious families can claim a Barthel kitchen in the family palazzo (not surprising, given that about 80 percent of the company’s business comes through word-of-mouth). Maria Shollenbarger, ELLE Decor, "An Italian Design Firm Transforms Discreet-but-Luxe Kitchens with a Timeless Florentine Aesthetic," 18 Oct. 2018 Work in the mouth is hard to see and make consistent. Laura Yan, Popular Mechanics, "New Dental Tech Can Tell When You're Scared," 28 July 2018 Lonely Whale, a foundation co-founded by the actor Adrian Grenier, has a (slightly hilarious) YouTube video showing an octopus slapping straws from the mouths of luminaries, including model Brooklyn Decker and astrophysicist Neil deGrasse Tyson. Caille Millner,, "A splash of cold water on straw-ban fervor: Many people with disabilities need them," 13 July 2018 Scott Feist, a fishing guide from California's Central Valley, said sea lions regularly venture more than 100 miles upriver from the mouth of the Pacific Ocean at the Golden Gate Bridge to prey on salmon. Ryan Sabalow, sacbee, "To protect salmon in the Columbia, will we have to kill more sea lions?," 6 July 2018 Running from its headwaters in Minnesota more than 2,300 miles to its Southern Louisiana mouth into the Gulf of Mexico, the Mississippi River is the world’s fourth-longest river. Nate Berg, Curbed, "Can engineering save Louisiana’s coastline?," 7 Nov. 2018 The likeness of each cat looked as if it had been attacked with a knife, their eyes and mouths gouged out. Sean Elder, Town & Country, "The War of The Grosses: Inside the Bitter Divorce Battle of the Laguna Beach "Bond King"," 22 Oct. 2018 The fitting process is not dissimilar to that of an elementary school basketball mouth guard. James Lynch, Popular Mechanics, "The Strange Noise-Blocking Plugs That Custom-Fit Your Ears," 19 Oct. 2018

Recent Examples on the Web: Verb

But Trump’s dysfunctional White House team began mouthing off in ways guaranteed to sabotage the summit. Trudy Rubin,, "North Korea meeting canceled thanks to Trump team's bluster | Trudy Rubin," 24 May 2018 Then Gingrich had wasted no time in bad-mouthing the deal. Neil Swidey,, "How Democrats would be better off if Bill Clinton had never been president," 10 July 2018 Another memorable moment in the video comes at the 2:23 mark when Grande stops singing and begins to mouth along to Madonna's reading of Samuel L. Jackson's speech from the 1994 film Pulp Fiction. Katherine Schaffstall, The Hollywood Reporter, "Ariana Grande Puts Feminist Spin on Religious Imagery in "God is a Woman" Music Video," 13 July 2018 Ganim accused Lamont of bad-mouthing Hartford, which Lamont said was another misrepresentation by his opponent. Neil Vigdor,, "Rival Democrats Ned Lamont And Joe Ganim Exchange Barbs In Raucous Debate," 12 July 2018 David spent his time bad-mouthing Jordan, while Jordan spent his time claiming that David was just a liar. Melissa Locker, Time, "The Bachelorette Recap: Wayne Newton and a Two-On-One Date Make Vegas Memorable," 26 June 2018 There was name-calling at Marshall; their center [mouthed] racial epithets on the floor. Mike Klingaman,, "Catching up with ... former Loyola Chicago and Bullets player Les Hunter," 30 Mar. 2018 While Trump can mouth the classic populist tropes about a globalist elite undermining the common people, there’s very little space in Trumpism for the masses gaining agency through political action. Jeet Heer, The New Republic, "Faux-populism in Duluth.," 21 June 2018 Consumer advocates naturally are skeptical of the utilities' poor-mouthing. Michael Hiltzik,, "Big utilities are desperately trying to stick customers for the bills from California wildfires," 4 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mouth.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of mouth


before the 12th century, in the meaning defined at sense 1a


14th century, in the meaning defined at transitive sense 1a

History and Etymology for mouth


Middle English, from Old English mūth; akin to Old High German mund mouth and perhaps to Latin mentum chin


see mouth entry 1

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Dictionary Entries near mouth





mouth bet



Statistics for mouth

Last Updated

5 Dec 2018

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Time Traveler for mouth

The first known use of mouth was before the 12th century

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More Definitions for mouth



English Language Learners Definition of mouth

 (Entry 1 of 2)

: the opening through which food passes into the body : the part of the face that includes the lips and the opening behind them

: an opening in something

: the place where a river enters the ocean



English Language Learners Definition of mouth (Entry 2 of 2)

: to say or repeat (something) without really meaning it or understanding it

: to form (words) with your lips without speaking


\ˈmau̇th \
plural mouths\ˈmau̇t͟hz, ˈmau̇ths \

Kids Definition of mouth

 (Entry 1 of 2)

1 : the opening through which food passes into the body and which in humans is surrounded on the outside by the lips and contains the tongue and teeth

2 : an opening that is like a mouth There was a butcher who worked in the mouth of a narrow alley.— Laurence Yep, Dragonwings

3 : the place where a stream enters a larger body of water


\ˈmau̇t͟h \
mouthed; mouthing

Kids Definition of mouth (Entry 2 of 2)

1 : to form with the lips without speaking The librarian mouthed “quiet.”

2 : to repeat without being sincere or without understanding Salesmen mouthed meaningless slogans.


\ˈmau̇th \
plural mouths\ˈmau̇t͟hz \

Medical Definition of mouth 

: the natural opening through which food passes into the animal body and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth

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More from Merriam-Webster on mouth

Rhyming Dictionary: Words that rhyme with mouth

Thesaurus: All synonyms and antonyms for mouth

Spanish Central: Translation of mouth

Nglish: Translation of mouth for Spanish Speakers

Britannica English: Translation of mouth for Arabic Speakers Encyclopedia article about mouth

Comments on mouth

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amusing and light sparring with words

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