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Master
master
master-at-arms
master builder
master chief petty officer
master class
master corporal
master gunnery sergeant
master key
master lease
master limited partnership
master mariner
Master of Arts
master of ceremonies
Master of Science
Master of Surgery
Master of the Rolls
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master key
mas·ter key (plural mas·ter keys)


noun 
Definition:
 
key opening all locks in place: a key that will open all the locks in a set or place
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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