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WORDNET DICTIONARY
THESAURUS

RELATED WORDS : catch catch a glimpse catch a wink catch at straws catch cold catch crop catch fire catch it catch one's breath catch out catch phrase catch some z's catch title catch up catch up with fair catch glottal catch safety catch shoestring catch

WORDNET DICTIONARY

Verb catch on has 2 senses

• catch on(v = verb.cognition) cotton on, get it, get onto, get wise, latch on, tumble, twig - understand, usually after some initial difficulty; "She didn't know what her classmates were plotting but finally caught on"
is one way to apprehend, compass, comprehend, dig, get the picture, grasp, grok, savvy
Sample sentences:
Somebody ----s
Somebody ----s PP

• catch on(v = verb.change) Array - become popular; "This fashion caught on in Paris"
is one way to change
Sample sentences:
Something ----s
Something is ----ing PP

THESAURUS

catch on

absorb, appreciate, apprehend, ascertain, assimilate, be blooded, be hep to, be on to, be successful, be wise to, be with one, become popular, become the rage, catch, catch on to, click, come off, comprehend, conceive, connect, determine, dig, digest, farewell, fathom, find out, follow, get, get hold of, get the drift, get the idea, get the picture, go, go great guns, go off, go over, go over big, go to town, graduate, grasp, have, have it taped, hear, ken, know, learn, make a hit, master, meet with success, pass, penetrate, prevail, prosper, qualify, read, realize, savvy, see, see through, seize, seize the meaning, sense, succeed, take, take in, tumble, tumble to, understand, unearth, wise up to, work well, work wonders

For further exploring for "catch on" in Webster Dictionary Online