Definition - What does Majority Opinion mean?
A majority opinion is the reasoning for a decision in a case that the majority of judges in a court officially endorse or agree with. It can only be written by a court that has three or more judges.
A majority opinion becomes precedent when it is published.
Justipedia explains Majority Opinion
A majority opinion is typically written by one judge, with other judges agreeing to it. It is different from a dissenting opinion or a concurrent opinion: A dissenting opinion is written by a judge who disagrees with the decision made by the majority of the judges in a court, while a concurrent opinion agrees with the majority opinion, but expresses a different reasoning process to the majority opinion. Other judges may join a concurrent or dissenting opinion, but the majority opinion will always involve the most judges in a court.