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[dih-tach] /dɪˈtætʃ/
verb (used with object)
to unfasten and separate; disengage; disunite.
Military. to send away (a regiment, ship, etc.) on a special mission.
Origin of detach
1470-80; < Middle French détacher, Old French destachier; see dis-1, attach
Related forms
detachable, adjective
detachability, noun
detachably, adverb
detacher, noun
nondetachability, noun
nondetachable, adjective
predetach, verb (used with object)
self-detaching, adjective
undetachable, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for detach


verb (transitive)
to disengage and separate or remove, as by pulling; unfasten; disconnect
(military) to separate (a small unit) from a larger, esp for a special assignment
Derived Forms
detachable, adjective
detachability, noun
detacher, noun
Word Origin
C17: from Old French destachier, from des-dis-1 + attachier to attach
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 detach

1680s, from French détacher "to detach, untie," from Old French destachier, from des- "apart" + attachier "attach" (see attach). Related: Detached; detaching.

Online Etymology Dictionary, © 2010 Douglas Harper
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detach in Medicine

detach de·tach (dĭ-tāch')
v. de·tached, de·tach·ing, de·tach·es

  1. To separate or unfasten; disconnect.

  2. To remove from association or union with something.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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