1 a belief or assessment based on grounds short of proof.
2 a view held as probable.
3 (often foll. by on) what one thinks about a particular topic or question (my opinion on capital punishment).
4 a a formal statement of professional advice (will get a second opinion). b Law a formal statement of reasons for a judgement given.
5 an estimation (had a low opinion of it).
Phrases and idioms:
be of the opinion that believe or maintain that. in one's opinion according to one's view or belief. a matter of opinion a disputable point. opinion poll = GALLUP POLL. public opinion views generally prevalent, esp. on moral questions.
Etymology: ME f. OF f. L opinio -onis (as OPINE)
Useful english dictionary. 2012.