the opening in the face of a person or animal through which food is taken in and from which speech and other sounds are emitted, the point where a river enters the sea

put one's money where one's mouth is, have a big mouth, shoot one's mouth off

foot in mouth, loudmouth, down in the mouth

Formal and Informal Expressions of mouth

In different contexts, you can replace 'mouth' with suitable alternatives. In a more formal setting, 'oral cavity' is apt. In informal speech or writing, 'trap, pie hole' is a commonplace synonym.

mouth: Explore its Definition & Usage

mouth Definition

1the opening in the face of a person or animal through which food is taken in and from which speech and other sounds are emitted
2the point where a river enters the sea

Using mouth: Examples

Take a moment to familiarize yourself with how "mouth" can be used in various situations through the following examples!

Example
She opened her mouth to speak.
Example
The cat caught the mouse in its mouth.
Example
He has a bad taste in his mouth.
Example
The river's mouth is located at the delta.

mouth Synonyms and Antonyms

Synonyms for mouth

maw
jaws
chops
oral cavity

Idioms Using mouth

put one's money where one's mouth is
to do what one says one will do, especially by providing financial support
Example
If you really believe in this project, why don't you put your money where your mouth is and invest in it?
have a big mouth
to talk too much or reveal secrets
Example
You have to be careful what you tell her because she has a big mouth and can't keep a secret.
shoot one's mouth off
to speak without thinking carefully, often saying things that are rude or inappropriate
Example
He got himself into trouble by shooting his mouth off about the boss.

Phrases with mouth

foot in mouth
an embarrassing mistake made in public by saying something foolish or inappropriate
Example
I really put my foot in my mouth when I asked her if she was pregnant.
loudmouth
a person who talks too much or too loudly, especially in a way that is annoying or offensive
Example
He's such a loudmouth that nobody wants to be around him.
down in the mouth
feeling sad, depressed, or discouraged
Example
She's been down in the mouth ever since she lost her job.

Origins of mouth

from Old English 'mūða'

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Summary: mouth in Brief

The term 'mouth' [maʊθ] refers to the opening in the face used for taking in food and emitting speech and sounds. It also refers to the point where a river enters the sea, as in 'The river's mouth is located at the delta.' Phrases like 'foot in mouth' and idioms like 'put one's money where one's mouth is' are common. 'Mouth' has informal synonyms like 'trap' and 'pie hole.'