Also found in: Thesaurus, Idioms.
1. (tr) to make smaller or more compact
2. (intr) to collapse, as with laughter or pain
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|Verb||1.||fold up - bend or lay so that one part covers the other; "fold up the newspaper"; "turn up your collar"|
change surface - undergo or cause to undergo a change in the surface
crease, crinkle, crisp, ruckle, scrunch up, wrinkle, scrunch - make wrinkles or creases on a smooth surface; make a pressed, folded or wrinkled line in; "The dress got wrinkled"; "crease the paper like this to make a crane"
corrugate - fold into ridges; "corrugate iron"
tuck - make a tuck or several folds in; "tuck the fabric"; "tuck in the sheet"
cross - fold so as to resemble a cross; "she crossed her legs"
collapse - fold or close up; "fold up your umbrella"; "collapse the music stand"
|2.||fold up - become folded or folded up; "The bed folds in a jiffy"|
change - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"