opinion-n; 5 Senses

Sense Number 1: belief or viewpoint about something

Commentary: OPINION[+state][+mental][+judgement][+belief]
NOTE: need not be a judgement of good or bad (see Sense 5)

What is Mary's opinion on the economy?
I have no opinion about where we go for dinner tonight.
His opinions appear frequently on the editorial page.
Public opinion on this issue appears to be divided into two camps.
The latest opinion polls show less support for the war.

WordNet 3.0 Sense Numbers: 1, 3, 2, 6

Sense Number 2: a formal document explaining the reasons for a legal ruling

Commentary: OPINION[+entity][+artifact][+document][+legal][+explanation][+ruling][+legal]
NOTE: the document which is generated as a result of the act of Sense 3

There are volumes of Supreme Court opinions in the law library.
Justice Brown wrote the dissenting opinion in the case.

WordNet 3.0 Sense Numbers: 4

Sense Number 3: a legal ruling

Commentary: OPINION[+event][+social][+legal][+ruling]

The court is expected to reach an opinion on the case next week.
The opinion of the Circuit Court is being appealed by the Justice Department.

WordNet 3.0 Sense Numbers: 5

Sense Number 4: professional or expert advice on some matter

Commentary: OPINION[+action][+advising][+expert]

They are seeking a second opinion about their daughter's heart condition.
Mary sought the opinion of an interior designer when redoing her bathrooms.
He dismissed the opinions of the experts and did it his own way.

WordNet 0.0 Sense Numbers: 1c

Sense Number 5: an estimation of something's worth

Commentary: OPINION[+state][+mental][+judgement][+estimation][+worth]
NOTE: a narrow usage of Sense 1 - this sense always implies an evaluation of good or bad

Mary believes John has an overly high opinion of himself.
We have a low opinion of that paint company's workmanship.
The teacher's opinion of that student went up significantly after the student won the science prize.

WordNet 0.0 Sense Numbers: 1b