Meaning of “opinion” - Learner’s Dictionary

opinion

noun uk us /əˈpɪnjən/

B1 [ C ] a thought or belief about something or someone:

What's your opinion about/on the matter?
He has fairly strong opinions on most subjects.
Why don't we ask Daniel's opinion?
In my opinion (= I think) he's the best football player we have in this country.
public opinion

B2 the thoughts and beliefs that most people have about a subject:

Eventually, the government will have to take notice of public opinion.
have a high/low opinion of sb/sth

to think that someone or something is good/bad:

He has a low opinion of doctors.

(Definition of “opinion” from the Cambridge Learner’s Dictionary © Cambridge University Press)