the act of expressing or setting forth in words

the free expression of political opinions.

a particular word, phrase, or form of words

old-fashioned expressions.

the manner or form in which a thing is expressed in words; wording; phrasing

delicacy of expression.

the power of expressing in words

joy beyond expression.

indication of feeling, spirit, character, etc., as on the face, in the voice, or in artistic execution

the lyric expression embodied in his poetry.

a look or intonation expressing personal reaction, feeling, etc.

a shocked expression.

the quality or power of expressing an attitude, emotion, etc.

a face that lacks expression; to read with expression.

the act of expressing or representing, as by symbols.

Mathematics . a symbol or a combination of symbols representing a value, relation, or the like.

Linguistics . the stylistic characteristics of an utterance ( opposed to meaning ).

Linguistics . the system of verbal utterances specific to a language ( opposed to content ).

the act of expressing or pressing out.

Computers . a combination of variables, constants, and functions linked by operation symbols and any required punctuation that describe a rule for calculating a value.

Genetics .

the action of a gene in the production of a protein or a phenotype.

expressivity ( def. 2 ) .