opinion

Etymology

From English opine + -ion, from Middle English opinion, opinioun, from Anglo-Norman and Middle French opinion, from Latin opīniō, from opīnor (“to opine”). Displaced native Old English wēna.

noun

1. A belief, judgment or perspective that a person has formed, either through objective or subjective reasoning, about a topic, issue, person or thing.
   I would like to know your opinions on the new filing system.
   In my opinion, white chocolate is better than milk chocolate.
   Every man is a fool in some man's opinion.
   We invite you to state your opinions about the suggestions.
   Truth, in matters of religion, is simply the opinion that has survived. 1891, Oscar Wilde, The Critic as Artist
2. The judgment or sentiment which the mind forms of persons or things; estimation.
3. (obsolete) Favorable estimation; hence, consideration; reputation; fame; public sentiment or esteem.
4. (obsolete) Obstinacy in holding to one's belief or impression; opiniativeness; conceitedness.
5. The formal decision, or expression of views, of a judge, an umpire, a doctor, or other party officially called upon to consider and decide upon a matter or point submitted.
6. (European Union law) a judicial opinion delivered by an Advocate General to the European Court of Justice where he or she proposes a legal solution to the cases for which the court is responsible

verb

1. (transitive, archaic) To have or express as an opinion.
   But if (as some opinion) King Ahasuerus were Artaxerxes Mnemon …, our magnified Cyrus was his second Brother 1658, Sir Thomas Browne, The Graden of Cyrus, Folio Society, published 2007, page 166