What is Expressional?

Expressional definition and meaning on Dictionary terms:
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 content1).
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).