Definition of "catch on" [catch on]

• To begin to understand; to realize. (verb)
• To become popular; to become commonplace; to become the standard. (verb)

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• "It is hard to know whether Coco Chanel would have approved but it is unlikely that torch-lit shoes are going to catch on amongst the couture set."
• "It would not catch on ceilings or doorjambs, and yet it too had almost the same power as katana."
• "May we catch on to the blessings in the center of our “dismayals.”"