Main Entry: ex·pres·sion

Pronunciation: \ik-ˈspre-shən\

Function: noun

Date: 15th century

1 a : an act, process, or instance of representing in a medium (as words) : utterance <freedom of expression> b (1) : something that manifests, embodies, or symbolizes something else <this gift is an expression of my admiration for you> (2) : a significant word or phrase (3) : a mathematical or logical symbol or a meaningful combination of symbols (4) : the detectable effect of a gene; also : expressivity 1
2 a : a mode, means, or use of significant representation or symbolism; especially : felicitous or vivid indication or depiction of mood or sentiment <read the poem with expression> b (1) : the quality or fact of being expressive (2) : facial aspect or vocal intonation as indicative of feeling
3 : an act or product of pressing out

— ex·pres·sion·al \-ˈspresh-nəl, -ˈspre-shə-n^əl\ adjective