The meaning of jackknife is a large strong pocketknife A jackknife is a clasp knife, one where the blade folds into the handle How to use jackknife in a sentence.
Jackknife - Guide, Benefits, and Form
The jackknife position, also known as the kraske position, is a variation of the prone position used in certain types of surgery
Adjective resembling a jackknife, as in its shape, function, or manner of opening and folding.
Jackknife noun [c] (jump) a dive (= jump into water, with your head and arms going in first) in which the diver, while in the air, bends from the waist to touch the toes without bending the legs, and then becomes straight again: The jackknife works by sequentially deleting one observation in the data set, then recomputing the desired statistic It is computationally simpler than bootstrapping, and more orderly (i.e The procedural steps are the same over and over again).
This movement leads to a “v” shape. Film and television jacknife, a 1989 american film by david jones jack knife, an episode of ncis jackknife, a character on superjail!