| 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" |