catch on

Definitions of catch on
  1. verb
    understand, usually after some initial difficulty
    “She didn't know what her classmates were plotting but finally caught on
    synonyms: cotton on, get it, get onto, get wise, latch on, tumble, twig
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    type of:
    apprehend, compass, comprehend, dig, get the picture, grasp, grok, savvy
    get the meaning of something
  2. verb
    become popular
    “This fashion caught on in Paris”
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    type of:
    undergo a change; become different in essence; losing one's or its original nature
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