Definitions

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

  • adj. Not constituting a vital element or part.
  • adj. Inessential or unrelated to the topic or matter at hand; irrelevant. See Synonyms at irrelevant.
  • adj. Coming from the outside: extraneous interference.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign
  • adj. Not essential or intrinsic

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not belonging to, or dependent upon, a thing; without or beyond a thing; not essential or intrinsic; foreign.

from The Century Dictionary and Cyclopedia

  • Not belonging or proper to a thing; not intrinsic or essential, though attached; foreign: as, to separate gold from extraneous matter; extraneous ornaments or observances.
  • Synonyms See exterior.
  • In music, not belonging to a standard scale or key; chromatic.

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

  • adj. not pertinent to the matter under consideration
  • adj. coming from the outside
  • adj. not belonging to that in which it is contained; introduced from an outside source
  • adj. not essential

Etymologies

From Latin extrāneus, from extrā, outside; see extra-.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin extrāneus ("from without, strange") (Wiktionary)

Examples

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