noun, often attributive
\ ˈmau̇th How to pronounce mouth (audio) \
plural mouths\ ˈmau̇t͟hz How to pronounce mouths (audio) also  ˈmau̇z How to pronounce mouths (audio) , ˈmau̇ths How to pronounce mouths (audio) ; in synecdochic compounds like "blabbermouths"  ˈmau̇ths is more frequent \

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 How to pronounce mouth (audio) also ˈmau̇th How to pronounce mouth (audio) \
mouthed; mouthing; mouths

Definition of mouth (Entry 2 of 2)

transitive verb

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

Keep scrolling for more

Other Words from mouth


mouthlike \ ˈmau̇th-​ˌlīk How to pronounce mouthlike (audio) \ adjective


mouther noun

Synonyms for mouth

Synonyms: Noun

Synonyms: Verb

Visit the Thesaurus for More 

Examples of mouth in a Sentence

Noun 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. Verb She was just mouthing the usual meaningless platitudes about the need for reform. silently mouthing the words to a song
See More
Recent Examples on the Web: Noun Clip eyes and mouths out of magazines and stick them on small pumpkins and gourds with glue dots to make mini pumpkin faces. Katie Kretschmer, Woman's Day, "Short Cuts Pumpkin," 9 Sep. 2019 Hadid rocked a dungaree jumpsuit with a bucket hat, and had a toothpick in her mouth for an edgier look. Amy Mackelden, Harper's BAZAAR, "Irina Shayk and Gigi Hadid Had a Moment at Jeremy Scott's NYFW Show," 7 Sep. 2019 As long as the photo shows the applicant’s eyes, nose and mouth without shadow or obstruction, what’s the difference? Eric Zorn,, "Column: Muslim woman’s lawsuit proves it’s time to stop the nonsense and end anti-headgear rules for driver’s licenses," 5 Sep. 2019 Sylvester Stallone also posted a deepfake of his recognizable eyes, nose and mouth on the Terminator's body. Carly Mallenbaum, USA TODAY, "Bill Hader has NOT seen those deepfake videos he's in: 'It's a weird technology, man'," 2 Sep. 2019 According to the lawsuit, nurses failed to provide the newborn with basic postdelivery medical care: The baby was not warmed after delivery, mucus was not cleared from his nose or mouth, and no clamps were available to sever the umbilical cord. Mariel Padilla,, "Woman gave birth in Denver jail cell alone, lawsuit says," 1 Sep. 2019 In the second incident, the sloth burned his entire face and had swelling around his eyes, nose, mouth and lips. Kieran Nicholson, The Denver Post, "Misdemeanor animal cruelty case involving SeaQuest sloth named Flash on tap in Jefferson County," 30 Aug. 2019 Still, despite what their past issues have been, Lovato doesn't want words put in her mouth. Julyssa Lopez, Glamour, "Demi Lovato Just Responded to Claims She Shaded Taylor Swift by Skipping the VMAs," 28 Aug. 2019 Measles is described by county health officials as a vaccine-preventable viral illness that's spread through coughing, sneezing and contact with secretions from the nose, mouth, and throat of an infected person. Chelsea Curtis, azcentral, "Measles exposure suspected from participant at Phoenix hip-hop event, health officials say," 23 Aug. 2019 Recent Examples on the Web: Verb The baby will nurse for a while but at 4 weeks he was observed already mouthing bits of fruits and vegetables, DeLanty said. Meg Jones, Milwaukee Journal Sentinel, "Adorable baby snow monkey is born at Milwaukee zoo; first healthy birth in 26 years," 20 June 2019 Rexha could be seen mouthing as Cabello and Mendes nuzzled noses and got within kissing distance during their duet. Karen Mizoguchi,, "Joe Jonas, Taylor Swift's Reaction After Shawn Mendes, Camila Cabello Didn't Kiss in MTV VMAs Duet," 26 Aug. 2019 The three 11-year-old heroes of Gene Stupnitsky’s new comedy are somewhat foul-mouthed, occasionally girl-crazy, and drawn into plenty of wild antics over the course of the movie—but every joke is about how bad these kids are at being bad. David Sims, The Atlantic, "Good Boys Is a Raunchy but Sweet Comedy," 12 Aug. 2019 Rue’s actress Zendaya is singing an original song in voiceover (Zendaya, who came up on the Disney Channel, had a music career in addition to her acting career for awhile), and onscreen, Rue is mouthing along to the words, but slightly off-beat. Constance Grady, Vox, "Why Euphoria’s messy season finale could mean great things for the show’s future," 11 Aug. 2019 Other obstacles include whether technology companies can adequately flag troublesome behavior in advance, and whether law enforcement can successfully separate out those bent on violence from those who simply mouth off about it. Eric Tucker, Twin Cities, "Shooting shows challenges for FBI in probing domestic terror," 5 Aug. 2019 Liberal viewers think Lake has mouthed off enough and needs to go. Kerry Lengel, azcentral, "Parlergate? What we know and don’t know about Kari Lake’s return to Fox 10," 24 July 2019 Most of the time, the camera was on Pacquiao, reverently mouthing the words to his country’s most precious piece of music. Bill Dwyre, Los Angeles Times, "Commentary: Manny Pacquiao’s victory would be the ultimate farewell to a storied career," 21 July 2019 The smaller males care for the eggs, fanning them and mouthing them to clean them. Jenny Howard, National Geographic, "These fish eggs aren't hatching. The culprit? Light pollution.," 9 July 2019

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.

See More

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

Noun and Verb

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

Keep scrolling for more

Learn More about mouth

Statistics for mouth

Last Updated

24 Oct 2019

Time Traveler for mouth

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

See more words from the same century

Keep scrolling for more

More Definitions for mouth


How to pronounce mouth (audio)

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


How to pronounce mouth (audio) How to pronounce mouth (audio)

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 How to pronounce mouth (audio) \
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 How to pronounce mouth (audio) \
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 How to pronounce mouth (audio) \
plural mouths\ ˈmau̇t͟hz How to pronounce mouths (audio) \

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

Keep scrolling for more

More from Merriam-Webster on mouth

Thesaurus: All synonyms and antonyms for mouth

Rhyming Dictionary: Words that rhyme with 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

What made you want to look up mouth? Please tell us where you read or heard it (including the quote, if possible).


to engage in dissolute behavior

Get Word of the Day daily email!

Test Your Vocabulary

Pass the Little Ribbons: A Pasta Word Quiz

  • rotelle pasta
  • Match the pasta to its meaning in English: Rotelle
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!