expression Meaning in the Cambridge English Dictionary
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Meaning of “expression” in the English Dictionary

"expression" in British English

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uk   us   /ɪkˈspreʃ.ən/

expression noun (SHOWING)

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 ofsupport for ​ourcampaign. Freedom of expression is a ​basichumanright. It's ​better to give expression to (= show)youranger, ​rather than ​hiding it.formal His ​sadness at the ​death of his ​wife found expression (= was ​shown) in his ​music. She ​plays the ​violin with ​great expression (= ​feeling).B2 [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.
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expression noun (WORDS)

B2 [C] a word or ​group of words used in a ​particularsituation or by ​particularpeople: He uses a lot of ​unusual expressions. "A can of ​worms" is an expression that ​means "a ​difficultsituation".
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expression noun (NUMBERS)

[C] in ​mathematics, a ​symbol or ​group of ​symbols that ​represent an ​amount: 4xy2 is an expression.
(Definition of expression from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"expression" in American English

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 us   /ɪkˈspreʃ·ən/
[C] a word or ​group of words having a ​particularmeaning or used in a ​particular way: That was an expression he hadn’t ​heard before, and ​wondered what it ​meant. mathematics [C] An expression is also a ​mathematicalstatement that ​includesnumbers, ​symbols, or both.

expression noun (SHOW)

[C/U] the ​act of ​showing a ​feeling or ​idea, or a ​feeling or ​idea that is ​shown: [C] She had such a ​sad expression on her ​face that I ​wondered what was ​wrong. [U] Freedom of expression is a ​cherishedright in democracies.
(Definition of expression from the Cambridge Academic Content Dictionary © Cambridge University Press)
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