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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.
Origin
1850-1855
1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for combination-lock

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 Value for combination

17
22
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