What is Foldback?

Foldback definition and meaning on Dictionary terms:
verb (used with object)
to bend (cloth, paper, etc.) over upon itself.
to bring into a compact form by bending and laying parts together (often followed by up): to fold up a map; to fold one’s legs under oneself.

to bring (the arms, hands, etc.) together in an intertwined or crossed manner; clasp; cross: He folded his arms on his chest.
to bend or wind (usually followed by about, round, etc.): to fold one’s arms about a person’s neck.
to bring (the wings) close to the body, as a bird on alighting.
to enclose; wrap; envelop: to fold something in paper.
to embrace or clasp; enfold: to fold someone in one’s arms.
Cards. to place (one’s cards) facedown so as to withdraw from the play.
Informal. to bring to an end; close up: The owner decided to fold the business and retire.

verb (used without object)
to be folded or be capable of folding: The doors fold back.
Cards. to place one’s cards facedown so as to withdraw from the play.

Informal. to fail in business; be forced to close: The newspaper folded after 76 years.
Informal. to yield or give in: Dad folded and said we could go after all.

a part that is folded; pleat; layer: folds of cloth.
a crease made by folding: He cut the paper along the fold.

a hollow made by folding: to carry something in the fold of one’s dress.
a hollow place in undulating ground: a fold of the mountains.
Geology. a portion of strata that is folded or bent, as an anticline or syncline, or that connects two horizontal or parallel portions of strata of different levels (as a monocline).
Journalism. the line formed along the horizontal center of a standard-sized newspaper when it is folded after printing. a rough-and-ready dividing line, especially on the front page and other principal pages, between stories of primary and lesser importance.

a coil of a serpent, string, etc.
the act of folding or doubling over.
Anatomy. a margin or ridge formed by the folding of a membrane or other flat body part; plica.

Verb Phrases
fold in, Cookery. to mix in or add (an ingredient) by gently turning one part over another: Fold in the egg whites.
fold up, Informal. to break down; collapse: He folded up when the prosecutor discredited his story. to fail, especially to go out of business.