1. (noun)expression, look, aspect, facial expression, face the feelings expressed on a person's face "a sad expression"; "a look of triumph"; "an angry face"
2. (noun)expression, manifestation, reflection, reflexion expression without words "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"
3. (noun)expression, verbal expression, verbalism the communication (in speech or writing) of your beliefs or opinions
"expressions of good will"; "he helped me find verbal expression for my ideas"; "the idea was immediate but the verbalism took hours"
5. (noun)formulation, expression the style of expressing yourself
"he suggested a better formulation"; "his manner of expression showed how much he cared"
6. (noun)formula, expression a group of symbols that make a mathematical statement
7. (noun)expression (genetics) the process of expressing a gene
8. (noun)construction, grammatical construction, expression a group of words that form a constituent of a sentence and are considered as a singleunit "I concluded from his awkward constructions that he was a foreigner"
9. (noun)expression the act of forcing something out by squeezing or pressing "the expression of milk from her breast"