opinion in WordNet English dictionary

1. a vague idea in which some confidence is placed
   "his impression of her was favorable"; "what are your feelings about the crisis?"; "it strengthened my belief in his sincerity"; "I had a feeling that she was lying"
   impression  feeling  belief  notion  opinion 
   
2. the legal document stating the reasons for a judicial decision
   "opinions are usually written by a single judge"
   opinion  legal opinion  judgment  judgement 
   
3. the reason for a court's judgment (as opposed to the decision itself)
   opinion  ruling 
   
4. a personal belief or judgment that is not founded on proof or certainty
   "my opinion differs from yours"; "I am not of your persuasion"; "what are your thoughts on Haiti?"
   opinion  sentiment  persuasion  view  thought 
   
5. a belief or sentiment shared by most people; the voice of the people
   "he asked for a poll of public opinion"
   public opinion  popular opinion  opinion  vox populi 
   
6. a message expressing a belief about something; the expression of a belief that is held with confidence but not substantiated by positive knowledge or proof
   "his opinions appeared frequently on the editorial page"
   opinion  view