fold

⁴fold

noun

Definition of FOLD

1

: a part doubled or laid over another part : pleat

2

: something that is folded together or that enfolds

3

a : a bend or flexure produced in rock by forces operative after the depositing or consolidation of the rock b chiefly British : an undulation in the landscape

4

: a margin apparently formed by the doubling upon itself of a flat anatomical structure (as a membrane)

5

: a crease made by folding something (as a newspaper)

Illustration of FOLD

First Known Use of FOLD

13th century