A kind of knife whose blade or blades can be folded inside the handle; such a knife is usually a pocketknife.

plural of folding knife

(programming, information science) Text normalization where uppercase and lowercase characters are treated as equivalent.

present participle of fold up

(felinology) A domestic cat of a breed with ears folded down towards the front of the head.

Alternative spelling of twofold

(idiomatic) To make or become more compact by folding. / (idiomatic) To go out of business.

(newspapers) Situated in the upper half of the front page of a broadsheet newspaper, and thus more prominent, as the lower half is not usually visible when the folded newspaper is displayed for sale.

An optical system in which prisms and/or mirrors are used to reduce the overall physical length of the system.

(newspapers) Printed on the lower half of the front page of a broadsheet newspaper, such that it is not immediately visible on a folded copy of the newspaper, e.g. as displayed at a newsstand or in a vending machine.