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roommate

[room-meyt, roo m-] /ˈrumˌmeɪt, ˈrʊm-/
noun
1.
a person who is assigned to share or shares a room or apartment with another or others.
Origin
1780-1790
1780-90, Americanism; room + mate1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for room-mate

roommate

/ˈruːmˌmeɪt; ˈrʊm-/
noun
1.
a person with whom one shares a room or lodging
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 room-mate

roommate

n.

also room-mate, 1789, American English, from room (n.) + mate (n.). Short form roomie is from 1918.

Online Etymology Dictionary, © 2010 Douglas Harper
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6
7
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