In mathematics:
* An expression is a combination of numbers, variables, and operations (like addition, subtraction, multiplication, division, etc.) that represents a value. It does not contain an equality sign (=).
* Example: 2x + 3y - 5 is an expression.
In language and communication:
* Expression refers to the way someone conveys their thoughts, feelings, and ideas. It can include:
* Verbal expression: Speaking, writing, singing.
* Nonverbal expression: Body language, facial expressions, gestures, art, music.
* Artistic expression: Painting, sculpting, writing poetry, acting.
In programming:
* Expression is a combination of variables, operators, and function calls that produces a value.
* Example: "Hello " + name + "!" is an expression in some programming languages.
Other definitions:
* Expression can also refer to a particular word, phrase, or clause in a sentence.
* It can also refer to a facial expression, which is a way of communicating emotions through the face.
To understand the meaning of "expression" in a specific context, you need to consider the surrounding information.