What is the meaning of Catch_on?

Chiefly in the form catch oneself on: to cause (oneself) to get or regain a proper appreciation of a situation; to behave in the expected, sensible way; to stop fooling around or being silly.

1. Chiefly followed by to: to cling or hold on to something; to get stuck on something; to take hold.
   1. Of food being cooked: to become stuck to the cooking vessel and brown or burn slightly.
2. Of an idea, a thing, etc.: to become fashionable or popular; also, to become established as standard; to become commonplace.

   Chiefly followed by to: to cling or hold on to something; to get stuck on something; to take hold.

   1. Of food being cooked: to become stuck to the cooking vessel and brown or burn slightly.

   Of food being cooked: to become stuck to the cooking vessel and brown or burn slightly.

   Of an idea, a thing, etc.: to become fashionable or popular; also, to become established as standard; to become commonplace.

   Followed by to: to recognize the potential of something; also, to take advantage of or use something (especially an idea, a trend, etc.).

   Chiefly followed by to: to (begin to) understand; to realize.

   Source: wiktionary.org