Definition of "Opinion" :

noun: the reason for a court's judgment (as opposed to the decision itself)

noun: a vague idea in which some confidence is placed

noun: a personal belief or judgment that is not founded on proof or certainty

"My opinion differs from yours."

noun: a belief or sentiment shared by most people; the voice of the people

"He asked for a poll of public opinion."

noun: the legal document stating the reasons for a judicial decision

"Opinions are usually written by a single judge."

noun: 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."