B2[C or U]the act of saying what you think or showing how you feel using words or actions: He wrote her a poem as an expression of his love.We've received a lot of expressions of support for our campaign.Freedom of expression is a basic human right.It's better to give expression to(= show) your anger, rather than hiding it.formalHis sadness at the death of his wife found expression (= was shown) in his music.She plays the violin with great expression (= feeling).Expressing and asking opinionsRemarks and remarkingControlling emotionsExpressing and showing feelingsB2[C]the look on someone's face, showing what they feel or think: I could tell from her expression that something serious had happened.Mark always has such a miserable expression on his face.The head and face