from The American Heritage® Dictionary of the English Language, 5th Edition.

  • intransitive verb To be next to; be contiguous to.
  • intransitive verb To attach.
  • intransitive verb To be contiguous.

from The Century Dictionary.

  • To join on or add; unite; annex or append.
  • To be contiguous to or in contact with: as, his house adjoins the lake; a field adjoining the lawn.
  • To be contiguous; lie or be next, or in contact: with to: as, “a farm adjoining to the highway,” Blackstone. To approach; join.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb To join or unite to; to lie contiguous to; to be in contact with; to attach; to append.
  • intransitive verb To lie or be next, or in contact; to be contiguous.
  • intransitive verb obsolete To join one's self.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb transitive To be in contact or connection with.
  • verb transitive, mathematics To extend an algebraic object (e.g. a field, a ring, etc.) by adding to it (an element not belonging to it) and all finite power series of (the element).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb lie adjacent to another or share a boundary
  • verb be in direct physical contact with; make contact
  • verb attach or add


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English ajoinen, from Old French ajoindre, ajoin-, from Latin adiungere, to join to : ad-, ad- + iungere, to join; see yeug- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Anglo-Norman adjoindre, from Latin adiungō.


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