Synonyms of catch on

Verb

1. catch on, get wise, get onto, tumble, latch on, cotton on, twig, get it, grok, get the picture, comprehend, savvy, dig, grasp, compass, apprehend

usage: understand, usually after some initial difficulty; "She didn't know what her classmates were plotting but finally caught on"

2. catch on, change

usage: become popular; "This fashion caught on in Paris"