Expression

Ex`pres´sion Pronunciation: ĕks`prĕsh´ŭn

The act of expressing; the act of forcing out by pressure; as, the expression of juices or oils; also, of extorting or eliciting; as, a forcible expression of truth.

The act of declaring or signifying; declaration; utterance; as, an expression of the public will.

With this tone of philosophy were mingled expressions of sympathy.

- Prescott.

Lively or vivid representation of meaning, sentiment, or feeling, etc.; significant and impressive indication, whether by language, appearance, or gesture; that manner or style which gives life and suggestive force to ideas and sentiments; as, he reads with expression; her performance on the piano has expression.

The imitators of Shakespeare, fixing their attention on his wonderful power of expression, have directed their imitation to this.

- M. Arnold.

That which is expressed by a countenance, a posture, a work of art, etc.; look, as indicative of thought or feeling.

It still wore the majesty of expression so conspicuous in his portraits by the inimitable pencil of Titian.

- Prescott.

A form of words in which an idea or sentiment is conveyed; a mode of speech; a phrase; as, a common expression; an odd expression.

(Math.) The representation of any quantity or relation by appropriate characters or symbols, usually in a specific order.

(Genetics) the production of products by a gene that cause the appearance of the corresponding protein or phenotype; - of a gene or of an organism with a specific gene; as, the expression the beta-galactosidase positive phenotype,

(Computers) a combination of characters linked by operators, occurring as part of the code of a computer program, which must be evaluated according to the rules of the computer language in order to produce a resulting value.

Past expression
beyond the power of description. - Milton.

Noun	1.	expression - the expression on a person's face; "a sad expression"; "a look of triumph"; "an angry face" Synonyms: look, face, facial expression, aspect
	2.	expression - expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition" Synonyms: reflexion, reflection, manifestation
	3.	expression - the communication (in speech or writing) of your beliefs or opinions; "expressions of good will"; "he helped me find expression for my ideas"
	4.	expression - a word or phrase that particular people use in particular situations; "pardon the expression" Synonyms: locution, saying
	5.	expression - the style of expressing yourself; "he suggested a better formulation"; "his manner of expression showed how much he cared" Synonyms: formulation
	6.	expression - a group of symbols that make a mathematical statement Synonyms: formula
	7.	expression - (genetics) the process of expressing a gene
	8.	expression - a group of words that form a constituent of a sentence and are considered as a single unit; "I concluded from his awkward constructions that he was a foreigner" Synonyms: grammatical construction, construction
	9.	expression - the act of forcing something out by squeezing or pressing; "the expression of milk from her breast"

EXPRESSION. The term or use of language employed to explain a thing.
2. It is a general rule, that expressions shall be construed, when they are capable of several significations, so as to give operation to the agreement, act, or will, if it can be done; and an expression is always to be understood in the sense most agreeable to the nature of the contract. Vide Clause; Construction; Equivocal; Interpretation; Words.

(programming)

expression - Any piece of program code in a high-level language which, when (if) its execution terminates, returns a value. In most programming languages, expressions consist of constants, variables, operators, functions, and parentheses. The operators and functions may be built-in or user defined. Languages differ on how expressions of different types may be combined - with some combination of explicit casts and implicit coercions.

The syntax of expressions generally follows conventional mathematical notation, though some languages such as Lisp or Forth have their own idiosyncratic syntax.

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