Definition of expression

• n. - The act of expressing; the act of forcing out by pressure; as, the expression of juices or oils; also, of extorting or eliciting; as, a forcible expression of truth.
• n. - The act of declaring or signifying; declaration; utterance; as, an expression of the public will.
• n. - Lively or vivid representation of meaning, sentiment, or feeling, etc.; significant and impressive indication, whether by language, appearance, or gesture; that manner or style which gives life and suggestive force to ideas and sentiments; as, he reads with expression; her performance on the piano has expression.
• n. - That which is expressed by a countenance, a posture, a work of art, etc.; look, as indicative of thought or feeling.
• n. - A form of words in which an idea or sentiment is conveyed; a mode of speech; a phrase; as, a common expression; an odd expression.
• n. - The representation of any quantity by its appropriate characters or signs.