catch on

verbs

understand, usually after some initial difficulty

"She didn't know what her classmates were plotting but finally caught on"

catch on, cotton on, get it, get onto, get wise, latch on, tumble, twig

become popular

"This fashion caught on in Paris"

catch on

is a type of (narrower)

undergo a change; become different in essence; losing one's or its original nature

"She changed completely as she grew older"; "The weather changed last night"