Definition of fold up 

1 : to give way : collapse, crumple at the first shot the deer stopped short, then suddenly folded up the old chair suddenly folded up under him

2a : to cease resistance or exertion : give up : fail, quit the horse folded up in the homestretch the defense folded up under the savage attack the weak just get crushed; you can't blame them for folding up— K. M. Dodson

b : to stop production or operation for lack of funds, support, or business success : go bankrupt : close up : close small businesses were folding up right and left

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Learn More about fold up

Dictionary Entries near fold up

fold mountain

foldout

fold soke

fold up

fold yard

Foley

Folger

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More from Merriam-Webster on fold up

Nglish: Translation of fold up for Spanish Speakers

Britannica English: Translation of fold up for Arabic Speakers

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