An opinion is your own personal opinion. An opinion on the moon being made of cheese is stupid as shit, like some Forrest Gump shit, but everyone is entitled to their own opinion. To that person, based on experiences they've had, info they've learned, how stupid they wanna be, the moon is made of cheese. To me, I think Taylor swift is the hottest singer currently, someone can't just say "you're wrong, Shakira is the hottest singer!". I'm not wrong, it's called an opinion. An opinion is a PERSONAL judgement of something Definition of opinion: a view or judgment formed about something, not necessarily based on fact or knowledge.