a lock that is unlocked by entering a combination
A lock that is operated by setting a particular sequence of numbers, rather than with a key.
A keyless lock which requires the turning of a numbered dial to a preset sequence of numbers for the lock to open. It is usually a three position, manipulation resistant, dial type lock, although cipher locks with push buttons are also referred to as combination locks.
A combination lock is a type of lock in which a sequence of numbers or symbols is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed numerals which directly interact with the locking mechanism, or through an electronic or mechanical keypad. Gerolamo Cardano is generally credited with the invention of the combination lock.
Combination Lock was the name of a new game show to be produced by Sony Pictures Television and distributed by King World for first-run daily syndication starting in the Fall of 2007. Before that, however, it was an unsold pilot recorded in Wales on February 9, 1996. The program's fate is in limbo following a failure to secure clearance into syndication.