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Meaning of “mouth” in the English Dictionary

"mouth" in British English

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mouthnoun

uk   /maʊθ/  us   /maʊθ/
  • mouth noun (BODY PART)

A1 [C] the opening in the face of a person or animal, consisting of the lips and the space between them, or the space behind containing the teeth and the tongue: Open your mouth wide and say "Ah". You shouldn't put so much food in your mouth at once.

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  • mouth noun (OPENING)

C1 [C usually singular] the opening of a narrow container, the opening of a hole or cave, or the place where a river flows into the sea: Quebec is at the mouth of the St Lawrence River.

mouthverb [T]

uk   /maʊð/  us   /maʊð/
to form words with the lips without making any sound: It looks to me as if the singers are only mouthing the words . [+ speech] "Can we go?" mouthed Mary.
to say something in a way that is not sincere: I don't want to stand here listening to you mouthing apologies.
See also
(Definition of mouth from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mouth" in American English

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mouthnoun

 us   /mɑʊθ/
  • mouth noun (BODY PART)

[C] the opening in the face used by a person or animal to eat and drink: I wish you wouldn’t chew with your mouth open.
  • mouth noun (OPENING)

[C usually sing] the opening of a hole or cave: We looked down into the mouth of the volcano.
[C usually sing] The mouth of a river is the place where it flows into the sea.
[C usually sing] The opening of a bottle or jar is also called a mouth.

mouthverb [T]

 us   /mɑʊð, mɑʊθ/
  • mouth verb [T] (BODY PART)

to move the lips as if speaking a word: I mouthed a single word, "Please."
Phrasal verbs
(Definition of mouth from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“mouth” in British English

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