Opinion:

noun Spoken: 2000 • Written: 1000
1 [C] your ideas or beliefs about a particular subject [+ about/on]:
• He was asked for his opinion on the Arab-Israeli peace process.• Carol has some pretty strong opinions about the military.:• give/express an opinion (= say what you think about something)2 [U] the general ideas or beliefs that a group of people have about something:
• Opinion seemed to be moving in favor of the president's accusers.• a development plan that took no account of public opinion3 [C] judgment or advice from a professional person about something:
• an expert opinion• We got a second opinion (= advice from a second person to make sure the first was right) before we replaced our furnace.4 have a high/low/bad etc. opinion of sb/sth to think that someone or something is very good or very bad:
• I've always had a good opinion of Rick's artwork.5 in my opinion also if you want my opinion used to firmly tell someone what you think about a particular subject:
• In my opinion, Will and Martha should have never gotten married.6 be of the opinion (that) FORMAL to think that something is true:
• The committee is of the opinion that Barnes was wrongfully dismissed. --see also difference of opinion (DIFFERENCE (5)) sth is a matter of opinion (MATTER1 (25))