A Lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token etc.), by supplying secret information (such as a keycode or password), or by a combination thereof.
- LOCK-AND-KEY, n. The distinguishing device of civilization and enlightenment.
- Ambrose Bierce, The Cynic's Dictionary (1906); republished as The Devil's Dictionary (1911).
- In essence, it [the report] says the world economy is breaking down and a continuation of current trends will lead to global chaos. . . . Double locks, armed guards and the fear of kidnapping and assassination are the new rewards for achievement almost everywhere ... War is often thought of in terms of military conflict or even annihilation. But there is a growing awareness that an equal danger might be chaos—as a result of mass hunger, economic disaster, environmental catastrophies and terrorism.
- Willy Brandt, West German chancellor, as reported in the Toronto Star (May 31, 1980).
- To the angel of the congregation in Philadelphia write: These are the things he says who is holy, who is true, who has the key of David, who opens so that no one will shut and shuts so that no one opens.