mouth noun - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “mouth”

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mouth

noun  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.
(Definition of mouth noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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