Noun
1. the expression on a person's face;
"a sad expression""a look of triumph""an angry face"2. expression without words;
"tears are an expression of grief""the pulse is a reflection of the heart's condition"3. the communication (in speech or writing) of your beliefs or opinions;
"expressions of good will""he helped me find expression for my ideas"4. a word or phrase that particular people use in particular situations;
"pardon the expression"5. the style of expressing yourself;
"he suggested a better formulation""his manner of expression showed how much he cared"6. a group of symbols that make a mathematical statement
7. (genetics) the process of expressing a gene
8. a group of words that form a constituent of a sentence and are considered as a single unit;
"I concluded from his awkward constructions that he was a foreigner"9. the act of forcing something out by squeezing or pressing;
"the expression of milk from her breast"