catch on
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verb (intr, adverb) informal
to become popular or fashionable
to grasp mentally; understand
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Words nearby catch on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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How to use catch on in a sentence
Other Idioms and Phrases with catch on
catch on
Understand, as in Aunt Mary doesn't catch on to any jokes. The verb to catch alone was used with this meaning from Shakespeare's time, on being added in the late 1800s. Also see get it, def. 2.
Become popular, as in This new dance is really beginning to catch on. [Late 1800s]
The American Heritage® Idioms Dictionary
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