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replacement

[ri-pleys-muh nt] /rɪˈpleɪs mənt/
noun
1.
the act of replacing.
2.
a person or thing that replaces another:
summer replacements for vacationing staff; a replacement for a broken dish.
3.
Military. a sailor, soldier, or airman assigned to fill a vacancy in a military unit.
4.
Also called metasomatism. Geology. the process of practically simultaneous removal and deposition by which a new mineral grows in the body of an old one.
Origin of replacement
1780-1790
First recorded in 1780-90; replace + -ment
Related forms
nonreplacement, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for replacement

replacement

/rɪˈpleɪsmənt/
noun
1.
the act or process of replacing
2.
a person or thing that replaces another
3.
(geology) the growth of a mineral within another of different chemical composition by gradual simultaneous deposition and removal
4.
a process of fossilization by gradual substitution of mineral matter for the original organic matter Also called petrification
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 Origin and History for replacement
n.

"act or fact of being replaced," 1790, from replace (v.) + -ment. Meaning "something that replaces another" is attested from 1894.

Online Etymology Dictionary, © 2010 Douglas Harper
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17
22
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