mouth noun definition in Mouth and teeth topic from the Oxford Advanced Learner's Dictionary

mouth

 noun: Mouth and teeth topic
the opening in the face used for speaking, eating, etc.; the area inside the head behind this opening She opened her mouth to say something. His mouth twisted into a wry smile. Their mouths fell open (= they were surprised). Don't talk with your mouth full (= when eating). The creature was foaming at the mouth.

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