catch onto (something)

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catch onto (something)

1. To snag on a particular surface, item, or material, usually with frustrating or unpleasant results. Be careful so that the zipper doesn't catch onto my dress—it's silk!
2. To latch onto something, usually as is intended. You probably need to get your necklace repaired so that this little piece catches onto the clasp securely.
See also: catch