(music, chiefly in the plural) A key with the same key signature as another key.

(chiefly video games) A key which, when pressed, hides a program from view by a superior in the workplace.

A keycard.

(computing) Any of a set of keyboard keys marked with directional arrows, used for navigation through documents and lists etc.

A serial key of a program to be installed from a compact disc.

(computing) Primary meta/modifier key used in Apple Macintosh computer keyboards for executing keyboard shortcuts. Usually represented by the ⌘ (Place of Interest Sign) and sometimes called the "Apple key" as the Apple logo is often on the key as well.

(computing) A key on a computer keyboard bearing the Microsoft Windows logo, used to open the Start menu and as a modifier key for various other functions.

(film) The head of the grip department, involved with lighting and camera movement.

plural of key grip

A special modifier key on a typewriter or computer keyboard, typically used to attach a specific diacritic to another character.