1. [noun] A particular way of phrasing an idea.
2. [noun] A colloquialism or idiom.
3. [noun] A facial appearance usually associated with an emotion.
4. [noun] (mathematics) An arrangement of symbols denoting values, operations performed on them, and grouping symbols.
5. [noun] (biology) The process of translating a gene into a protein.
6. [noun] (programming) A piece of code in a high-level language that returns a value.
7. [noun] Of a mother, the process of expressing milk.
8. [noun] The feelings expressed on a person's face; 'a sad expression'; 'a look of triumph'; 'an angry face'.
9. [noun] Expression without words; 'tears are an expression of grief'; 'the pulse is a reflection of the heart's condition'.
10. [noun] 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'.
11. [noun] A word or phrase that particular people use in particular situations; 'pardon the expression'.
12. [noun] The style of expressing yourself; 'he suggested a better formulation'; 'his manner of expression showed how much he cared'.
13. [noun] A group of symbols that make a mathematical statement.
14. [noun] (genetics) the process of expressing a gene.
15. [noun] 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'.
16. [noun] The act of forcing something out by squeezing or pressing; 'the expression of milk from her breast'.
