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

  • adj. Close to; lying near: adjacent cities.
  • adj. Next to; adjoining: adjacent garden plots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lying next to, close, or contiguous; neighboring; bordering on.
  • adj. Just before, after, or facing.
  • n. Something that lies next to something else, especially the side of a right triangle that is neither the hypotenuse nor the opposite.
  • prep. Next to; adjacent to; beside.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Lying near, close, or contiguous; neighboring; bordering on.
  • adj. See Angle.
  • n. That which is adjacent.
  • n. such as have one leg common to both angles.

from The Century Dictionary and Cyclopedia

  • Lying near, close, or contiguous; adjoining; neighboring: as, a field adjacent to the highway.
  • n. That which is next or contiguous; an abutting neighbor.
  • n. In logic, a predicate.

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

  • adj. having a common boundary or edge; abutting; touching
  • adj. nearest in space or position; immediately adjoining without intervening space
  • adj. near or close to but not necessarily touching


Middle English, from Latin adiacēns, adiacent-, present participle of adiacēre, to lie near : ad-, ad- + iacēre, to lie; see yē- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Latin adiacēns, adiacentis. (Wiktionary)


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