Broken and useless; no longer working or effective.
Taken from the German kaputt, in turn from French (être) capot meaning to (be) without tricks in a card game.
“The entire system is kaput, it needs rethinking right from the beginning.”
“Damn, the car is kaput and I can’t afford to replace it right now.”
With regard to, or at the level of, orders in a taxonomic system; according to an ordinal number, system, etc.; on an ordinal scale; with regard to order.
Mid 19th century; earliest use found in The Edinburgh Review. From ordinal + -ly.