Definition from macmillandictionary.com
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He uses childish expressions like ‘easy-peasy’.
Avoid colloquial expressions that are out of place in an academic essay.
She had a puzzled expression on her face.
I noticed his expression of disgust.
searching for new forms of artistic expression
the expression of anger through violence
The parade is a public expression of civic pride.
The sombre music gave expression to his deepest feelings of despair.
Some of the actors need to put a lot more expression into their voices.
Thank you for all your expressions of sympathy.