being in contact at some point or line; located next to another; bordering; contiguous: the adjoining room; a row of adjoining town houses.

1485–95; adjoin + -ing2

nonadjoining, adjective
unadjoining, adjective

adjacent, adjoining (see synonym study at the current entry).

Adjoining, adjacent, bordering all mean near or close to something. Adjoining implies touching, having a common point or line: an adjoining yard. Adjacent implies being nearby or next to something else: all the adjacent houses; adjacent angles. Bordering means having a common boundary with something: the farm bordering on the river.

separated. Unabridged


verb (used with object)
to be close to or in contact with; abut on: His property adjoins the lake.
to attach or append; affix.
verb (used without object)
to be in connection or contact: the point where the estates adjoin.

1275–1325; Middle English a(d)joinen < Middle French ajoindre. See ad-, join

unadjoined, adjective

adjoin, adjourn. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
adjoin (əˈdʒɔɪn)
vb (foll by to)
1.  to be next to (an area of land, etc)
2.  to join; affix or attach
[C14: via Old French from Latin adjungere, from ad- to + jungere to join]

adjoining (əˈdʒɔɪnɪŋ)
being in contact; connected or neighbouring

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

early 14c., from O.Fr. ajoin- stem of ajoindre, from L. adjungere "join to," from ad- "to" + jungere "to bind together" (see jugular).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Yesterday's papers reported the sales of two houses adjoining each other for
  more than a million dollars.
We did not find a pair of tenure-track jobs at adjoining universities.
The city council agreed to build an access road to the hospital on an adjoining
Paintings and more economically-priced handicrafts are sold in the adjoining
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