The amount that can be carried on a knife.

Third-person singular simple present indicative form of jack-knife

Third-person singular simple present indicative form of hot-knife

A knife, with a serrated edge, designed to cut bread; sometimes slots into a breadboard.

A table knife with a sharp, narrow, and often serrated blade designed for cutting tougher foods such as cooked meats.

(Britain, Ireland) A type of knife which has the blade mounted on a pivot so that it can fold back sideways into the handle when not in use, but can flick out straight, usually with a spring-loaded mechanism, when required.

A large knife designed for use in hunting animals, usually with a smooth front edge and a back edge that is partially serrated for sawing.

Alternative form of paperknife

A compact folding knife. / The front-dive pike, in which the body folds and unfolds. / (colloquial) A semi-trailer truck accident in which the vehicle mimics the closing of a jack-knife.

To fold in the middle, as a jackknife does. / (colloquial) To cause a semi-trailer truck to fold like a jackknife in a traffic accident.