opinion
opin·ion
 /əˈpınjən/  noun  ,  pl   -ions
  1 : a belief, judgment, or way of thinking about something : what someone thinks about a particular thing
   [  count  ] Why ask (for) my opinion if you have already decided?
    I value your opinion. [=I respect the way you think about things]
    We asked for their opinions about/on the new stadium.
    In my opinion, it's the best car on the market.
    Most of the people surveyed have a high/low opinion of the organization. [=most of the people surveyed think that the organization is good/bad]
    She has enough knowledge of the system to offer an informed opinion [=an opinion based on information] of why it isn't working.
    The meeting will give residents a chance to listen to some expert opinions. [=opinions of experts]
   [  noncount  ] The owner of the store is often there to offer customers expert opinion. [=an expert's opinion]
    Which one is better is a matter of opinion. [=people have different opinions about which one is better]
    I'm glad that we can have a difference of opinion [=we can disagree] and still be friends.
    The general opinion is that the players are paid too much. [=most people think that the players are paid too much]
    The company has been unsuccessful in its efforts to sway/change public opinion. [=to change what most people think]
    Contrary to popular opinion [=despite what many people think], fame does not always bring happiness.
  2 [  count  ] : advice from someone with special knowledge : advice from an expert
   We're still seeking medical opinions [=advice from doctors] on the cause of the pain.
   My doctor says I need surgery, but I'm going to get a second opinion. [=advice from a second doctor to make sure advice from the first doctor is correct]
  3 [  count  ] technical : a formal statement by a judge, court, etc., explaining the reasons a decision was made according to laws or rules
   The article discusses two recent Supreme Court opinions.
  be of the opinion
   : to have a specifed opinion or belief
    They are of the opinion [=they think/believe] that the accident was caused by faulty wiring.
  the court of public/world opinion — see court, 1