[n] the act of forcing something out by squeezing or pressing; "the expression of milk from her breast"
[n] the expression on a person's face; "a sad expression"; "a look of triumph"; "an angry face"
[n] 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"
[n] a group of symbols that make a mathematical statement
[n] expression without words; "tears are an expression of grief"; "the pulse is a reflection of the heart's condition"
[n] the style of expressing yourself; "he suggested a better formulation"; "his manner of expression showed how much he cared"
[n] the communication (in speech or writing) of your beliefs or opinions; "expressions of good will"; "he helped me find expression for my ideas"
[n] a word or phrase that particular people use in particular situations; "pardon the expression"
[n] (genetics) the process of expressing a gene