(architecture) To raise (the whole ring of an arch) off its centering, by driving in the keystone forcibly. / (music) To raise the pitch of. / (figuratively) To produce nervous tension in.

A tool used to extract teeth by a motion resembling that of turning a key.

An adjustable wrench in which the movable jaw is made fast by a key.

A bolt which has a mortise near the end, and is secured by a cotter or wedge instead of a nut.

A picklock.

plural of Key lime

(carpentry) fox wedge

A device for transmitting Morse code by hand, still used by radio amateurs today.

Alternative form of keyword

Dated form of keyword.