expression (Noun) — The feelings expressed on a person's face. ex. "a sad expression" ex. "a sad facial expression"
expression (Noun) — A sign or symptom; a way of showing something. ex. "tears are an expression of grief"
expression (Noun) — The communication (in speech or writing) of your beliefs or opinions. ex. "expressions of good will" ex. "he helped me find verbal expression for my ideas"
expression (Noun) — A word or phrase that particular people use in particular situations. ex. "pardon the expression"
expression (Noun) — The style of expressing yourself. ex. "his manner of expression showed how much he cared"
expression (Noun) — (mathematics) a group of symbols that make a mathematical statement.
expression (Noun) — (genetics) the process of expressing a gene.
expression (Noun) — A group of words that form a constituent of a sentence and are considered as a single unit. ex. "I concluded from his awkward expressions that he was a foreigner"
expression (Noun) — The act of forcing something out by squeezing or pressing. ex. "the expression of milk from her breast"