4. That which is expressed by a countenance, a posture, a work of art, etc.; look, as indicative of thought or feeling. "The expression of an eye." Tennyson. It still wore the majesty of expression so conspicuous in his portraits by the inimitable pencil of Titian. Prescott.
5. 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.
6. (Math.)
Defn: The representation of any quantity by its appropriate characters or signs. Past expression, Beyond expression, beyond the power of description. "Beyond expression bright." Milton.
EXPRESSIONAL
Ex*pres"sion*al, a.
Defn: Of, or relating to, expression; phraseological; also, vividly representing or suggesting an idea sentiment. Fized. Hall. Ruskin.
EXPRESSIONLESS
Ex*pres"sion*less, a.
Defn: Destitute of expression.
EXPRESSIVE
Ex*press"ive, a. Etym: [Cf. F. expressif.]
1. Serving to express, utter, or represent; indicative; communicative; — followed by of; as, words expressive of his gratitude. Each verse so swells expressive of her woes. Tickell.