Wikipedia logo The Simple English Wikipedia has an article on: Opinion opinion is on the Basic English 850 List. opposite - opinion - other Pronunciation IPA (key): /əˈpɪnjən/ Audio (US)(file) Hyphenation: o‧pin‧ion Noun Singular opinion Plural opinions (countable) An opinion is a personal idea, a person’s thoughts on a topic. You gave your opinion of the case. Synonyms idea thought view viewpoint point of view Antonyms fact Related words opinionatedWikiwand - on Seamless Wikipedia browsing. On steroids.