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keyway

[kee-wey] /ˈkiˌweɪ/
noun
1.
Machinery. a groove in a shaft, the hub of a wheel, etc., for receiving part of a key holding it to another part.
2.
a slot in a lock for receiving and guiding the key.
3.
(in poured-concrete construction) a longitudinal groove in a footing, or in a pour that has set, providing a key for newly poured concrete.
4.
a depression or slot carved into rock to provide a bond or anchorage for a structure, as a dam.
Origin
1865-1870
1865-70; key1 + way
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for key-way

keyway

/ˈkiːˌweɪ/
noun
1.
a longitudinal slot cut into a component to accept a key that engages with a similar slot on a mating component to prevent relative motion of the two components
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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