a belief or judgement not based on complete knowledge
belief
Cases of word usage
1) opinion about what to do, how to behave (advice)
2) an opinion or judgement of how good, valuable etc a person or thing is (appraisal)
3) decided by personal opinion and not because of a rule or for a reason (arbitrary)
4) to talk about a decision what is to happen a meaning etc and express a different opinion (argue)
5) to cause (and emotion, opinion etc) to exist (arouse)
6) a person with a strong opinion or belief and who thinks other ideas are wrong (bigot)
7) the quality of expressing an unpleasant opinion honestly (candour)
8) too much support or enthusiasm for sexual superiority, a particular opinion etc (chauvinism)
9) too high opinion of, too much pride in, oneself or one's abilities (conceit)
10) to go to (a person, a book etc) for information, advice, opinion etc (consult)