WordNet
n. (computer science) the key on a computer keyboard that is used (in combination with some other key) to type control characters [syn: control key]
Wikipedia
The Command key (⌘), also historically known as the Apple key, clover key, open-Apple key, splat key, pretzel key, propeller key, squiggly button, AppleSquiggle, hairball, funny key, butterfly key, the quad button , or meta key, is a modifier key present on Apple keyboards. The Command key's purpose is to allow the user to enter keyboard commands in applications and in the system. An "extended" Macintosh keyboard — the most common type — has two command keys, one on each side of the space bar; some compact keyboards have one only on the left.
The "⌘" symbol (the " looped square") was chosen by Susan Kare after Steve Jobs decided that the use of the Apple logo in the menu system (where the keyboard shortcuts are displayed) would be an over-use of the logo. Apple's adaptation of the symbol — encoded in Unicode (and HTML) at — was derived in part from its use in Scandinavian countries to denote places of interest. The symbol is known by various other names, including "Saint John's Arms" and " Bowen knot".
Usage examples of "command key".
Thus, pressing any specific command key could produce as many as 128 different results.
He tapped a command key to create a ghostly sphere of faint light, about the size of a cherry, and turned the tracker ball again to guide the sphere until it enclosed a selected part of the image.