Expression



[ik-spresh-uh n] /ɪkˈsprɛʃ ən/

noun
1.
the act of expressing or setting forth in words:
the free expression of political opinions.
2.
a particular word, phrase, or form of words:
old-fashioned expressions.
3.
the manner or form in which a thing is expressed in words; wording; phrasing:
delicacy of expression.
4.
the power of expressing in words:
joy beyond expression.
5.
indication of feeling, spirit, character, etc., as on the face, in the voice, or in artistic execution:
the lyric expression embodied in his poetry.
6.
a look or intonation expressing personal reaction, feeling, etc.:
a shocked expression.
7.
the quality or power of expressing an attitude, emotion, etc.:
a face that lacks expression; to read with expression.
8.
the act of expressing or representing, as by symbols.
9.
Mathematics. a symbol or a combination of symbols representing a value, relation, or the like.
10.
Linguistics. the stylistic characteristics of an utterance (opposed to ).
11.
Linguistics. the system of verbal utterances specific to a language (opposed to 1. ).
12.
the act of expressing or pressing out.
13.
Computers. a combination of variables, constants, and functions linked by operation symbols and any required punctuation that describe a rule for calculating a value.
14.
Genetics.

/ɪkˈsprɛʃən/
noun
1.
the act or an instance of transforming ideas into words
2.
a manifestation of an emotion, feeling, etc, without words: tears are an expression of grief
3.
communication of emotion through music, painting, etc
4.
a look on the face that indicates mood or emotion: a joyful expression
5.
the choice of words, phrases, syntax, intonation, etc, in communicating
6.
a particular phrase used conventionally to express something: a dialect expression
7.
the act or process of forcing or squeezing out a liquid
8.
(maths) a variable, function, or some combination of constants, variables, or functions
9.
(genetics) the effect of a particular gene on the phenotype
n.

early 15c., “action of pressing out;” later (mid-15c.) “action of manifesting a feeling;” (late 15c.) “a putting into words,” from Middle French expression (14c.), from Late Latin expressionem (nominative expressio), noun of action from past participle stem of exprimere (see express (v.)). Meaning “an action or creation that expresses feelings” is from 1620s. Of the face, from 1774. Occasionally the word also was used literally, for “the action of squeezing out.”

expression ex·pres·sion (ĭk-sprěsh’ən)
n.

programming
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.
(2001-05-14)

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