(BODY PART) [noun] [C] - the opening in the face of a person or animal, consisting of the lips and the space between them, or the space behind such an opening containing the teeth and the tongueOpen your mouth wide and say "Ah".I wish you'd close your mouth when you eat.You shouldn't put so much food in your mouth at once.He hit me in the mouth.See pictures: Mouths, Head(informal) He says he's going to complain to the manager, but I reckon he's all mouth (= he's not brave enough to do what he says he's going to do).(informal) What are you looking so down in the mouth (= unhappy) about?I don't know how they manage with seven (hungry) mouths to feed (= people, esp. children, in one family or group of people, who need to be given food).(informal) The burglars told the old lady that if she didn't keep her mouth shut (= say nothing), they'd hit her.The smell of that bacon cooking is making my mouth water (= making me want to eat it).(saying) 'Out of the mouths of babes and sucklings' means that children often say wise things.A mouth organ is a harmonica.Mouth-to-mouth (resuscitation) is artificial respiration.See at artificial.If something is mouth-watering, it looks as if it will taste good.Look at those mouth-watering cakes.
Meaning of MOUTH in English
Cambridge English vocab. Кембриджский английский словарь. 2012