box pleat - a flat double pleat made by folding under the fabric on either side of it

inverted pleat - a box pleat reversed so that the fullness is turned inward

kick pleat - pleat in back of a straight skirt to allow ease in walking

knife pleat - a single pleat turned in one direction

tuck - a narrow flattened pleat or fold that is stitched in place

crease, crimp, fold, plication, flexure, bend - an angular or rounded shape made by folding; "a fold in the napkin"; "a crease in his trousers"; "a plication on her blouse"; "a flexure of the colon"; "a bend of his elbow"

fold, fold up, turn up - bend or lay so that one part covers the other; "fold up the newspaper"; "turn up your collar"

fold, fold up, turn up - bend or lay so that one part covers the other; "fold up the newspaper"; "turn up your collar"