opinion Definition in the Cambridge English Dictionary
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Definition of “opinion” - English Dictionary

Definition of "opinion" - American English Dictionary

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opinionnoun [C/U]

 us   /əˈpɪn·jən/
the ​ideas that a ​person or a ​group of ​people have about something or someone, which are ​basedmainly on ​theirfeelings and ​beliefs, or a ​singleidea of this ​type: [C] When you're a ​teenager you've got ​strong opinions on/about everything. [C] McGuinness was ​expressing his ​personal opinion. [U] Her writings ​influencedpublic opinion. [C] I ​think you’re ​wrong, though you’re ​certainlyentitled to ​your opinion.
(Definition of opinion from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definition of "opinion" - British English Dictionary

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opinionnoun

uk   us   /əˈpɪn.jən/
B1 [C] a ​thought or ​belief about something or someone: What's ​your opinion about/on the ​matter? People ​tend to havestrong opinions on ​capitalpunishment. He didn't express/give an opinion on the ​matter. Who, inyour opinion, (= who do you ​think) is the ​bestsoccerplayer in the ​world today? He's very much of the opinion thatalternativemedicine is a ​waste of ​time.B2 [U] the ​thoughts or ​beliefs that a ​group of ​people have: Eventually, the ​government will have to take ​notice of public opinion. There is a ​diverserange of opinion on the ​issue. There was a difference of opinion as to the ​desirability of the ​project. Opinion is ​divided as to whether the ​treatmentactuallyworks. Both ​performances were ​excellent, it's ​simply a ​matter of opinion as to whose was ​better.B1 [C] a ​judgment about someone or something: Her opinion ofAdamchanged after he was so ​helpful at the ​wedding. She has a good/high opinion of his ​abilities (= ​thinks he is good). I have a ​pretty bad/​low/​poor opinion of my sister's ​boyfriend (= I do not like or ​approve of him). He has a very high opinion of himself (= ​thinks he is very ​skilled/​clever in a way that is ​annoying).B1 [C] a ​judgment made by an ​expert: My ​doctor has referred me to a ​specialist for a second opinion on the ​results of my ​bloodtest.
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(Definition of opinion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

Definition of "opinion" - Business English Dictionary

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opinionnoun

uk   us   /əˈpɪnjən/
[C] a ​thought or belief about something or someone: an opinion on sth What's your opinion on Britain ​joining the ​Euro?have/hold an opinion She has ​strong opinions on how ​people should ​dress for ​work.express/give your opinion They will have the ​opportunity to ​express their opinion on the ​design.ask/seek sb's opinion We will ​seek opinions from the ​public before going ​forward.in sb's opinion Who, in your opinion, is the best ​candidate for the ​job?be of the opinion that He's very much of the opinion that we should ​outsource the ​project.
[U] the thoughts or beliefs that a ​group of ​people have: Eventually, the ​government will have to take ​notice of public opinion. There was a difference of opinion over his ​appointment. Opinion is ​divided as to whether the ​treatment actually ​works. It's a matter of opinion which ​approach is best.
[C] a ​judgment about someone or something: an opinion of sb/sth Her opinion of Adam ​changed after he'd helped her with her ​project. She has a high opinion of his ​abilities. I have a rather ​poor opinion of the ​salesmanager.
[C] a ​judgment made by an ​expert: You should get a second opinion from an ​engineer.
(Definition of opinion from the Cambridge Business English Dictionary © Cambridge University Press)
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“opinion” in Business English

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