master key

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noun

a key that will open a number of different locks, the proper keys of which are not interchangeable.

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His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of master key

First recorded in 1570–80

Words nearby master key

master cylinder, master file, masterful, master gunnery sergeant, master hand, master key, masterly, master mason, master mechanic, mastermind, Master of Arts

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use master key in a sentence

There are methods and formulae in science which serve as master keys to many apparently different...
Mathematicians Prove 2D Version of Quantum Gravity Really Works|Charlie Wood|June 17, 2021|Quanta Magazine
You must search for the secret springs that govern his actions and for the master key that will unlock his heart.
The value of a praying mother|Isabel C. Byrum
Not since he had discovered the master-key of Evolution had Thyrsis come upon any set of ideas that meant so much to him.
Love's Pilgrimage|Upton Sinclair
The theory of the class struggle is the master key to the bewilderments and confusions of history.
The Book of Life: Vol. I Mind and Body; Vol. II Love and Society|Upton Sinclair

This was the master-key to her behaviour, and once I had got it, which I soon did, it was easy to unlock her breast.
Memoirs of Miss Sidney Biddulph|Frances Sheridan
Look, only look into the closet; wait here a moment, and I'll fetch a master key that shall open every one of them.
The Castle of Andalusia|John O'Keeffe

British Dictionary definitions for master key

master key

noun

a key that opens all the locks of a set, the individual keys of which are not interchangeableAlso called: pass key

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

master key

Origin of master key

Words nearby master key

Words related to master key

How to use master key in a sentence

British Dictionary definitions for master key