What is the meaning of Expression?

The action of expressing thoughts, ideas, feelings, etc.

A particular way of phrasing an idea.

A colloquialism or idiom.

A facial appearance usually associated with an emotion.

An arrangement of symbols denoting values, operations performed on them, and grouping symbols.

The process of translating a gene into a protein.

A piece of code in a high-level language that returns a value.

A specific blend of whisky.

The act of pressing or squeezing out.

The tone of voice or sound in music.

Emotional involvement or engagement in a text read aloud rendered by the voice of the reciter or the reader.

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Source: wiktionary.org