defined

ex*pres*sion [ek’spresen] n. 1 a putting into words: Clarity of expression is important in style. 2 a word or group of words used as a unit: ‘Wise guy’ is a slang expression. 3 a showing by look, voice, or action: Her sigh was an expression of sadness. 4 something that indicates feeling, spirit, character, etc.; look that shows feeling: He had a silly expression onĀ  his face. 5 a bringing out the meaning or beauty of something read, spoken, played sung, etc.: Try to read with more expression...

Source: Gage Canadian Dictionary