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combination lock

noun

  1. a lock opened by rotating one or more specially marked dials a given number of times through a particular set of positions in a prescribed order and direction.



combination lock

noun

  1. a type of lock that can only be opened when a set of dials releasing the tumblers of the lock are turned to show a specific sequence of numbers

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of combination lock1

First recorded in 1850–55

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