Definition from Wiktionary, the free dictionary
- (intransitive, idiomatic) To begin to understand; to realize.
- He didn't have to explain; I caught on right away.
- (intransitive, idiomatic) To become popular; to become commonplace; to become the standard.
- It's a crummy idea, and I certainly hope it does not catch on.
- (become commonplace or standard): go the way of the dinosaurs