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. 他给她写了一首诗以表达爱慕之情。

We've received a lot of expressions of support for our campaign. 我们收到很多来信表示支持我们的运动。

Freedom of expression is a basic human right. 言论自由是基本的人权。

It's better to give expression to (= show) your anger, rather than hiding it. 最好把愤怒发泄出来，而不是深藏于心。

formal His sadness at the death of his wife found expression (= was shown) in his music. 他通过音乐表达了对亡妻的哀悼之情。

She plays the violin with great expression (= feeling). 她的小提琴演奏很有表现力。

the look on someone's face, showing what they feel or think

I could tell from her expression that something serious had happened. 一看她的脸色我就知道出了很严重的事情。

Mark always has such a miserable expression on his face. 马克脸上总是带着一副苦恼的神情。

a word or group of words used in a particular situation or by particular people

He uses a lot of unusual expressions. 他总是用很多生僻的字眼。

"A can of worms" is an expression that means "a difficult situation". A can of worms这个短语的意思是“棘手的局面”。

in mathematics, a symbol or group of symbols that represent an amount

4xy2 is an expression. 4xy2是一个表达式。