Definitions

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

  • adj. Not changed, modified, or affected.
  • adj. Marked by lack of affectation; genuine. See Synonyms at naive.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Lacking pretense or affectation; natural.
  • n. Someone not affected, as by a disease.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not affected or moved; destitute of affection or emotion; uninfluenced.
  • adj. Free from affectation; plain; simple; natural; real; sincere; genuine.

from The Century Dictionary and Cyclopedia

  • Not affected.
  • Not moved; not having the heart or passions touched; destitute of affection or emotion.
  • Not showing affectation; plain; natural; not artificial; simple.
  • Real; not pretended; sincere: as, unaffected sorrow.

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

  • adj. free of artificiality; sincere and genuine
  • adj. unaware of or indifferent to
  • adj. undergoing no change when acted upon
  • adj. emotionally unmoved

Etymologies

un- +‎ affected. (Wiktionary)

Examples

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