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

  • adj. Not acceptable; unsatisfactory.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. unsatisfactory; not acceptable
  • adj. not conforming to accepted usage

from the GNU version of the Collaborative International Dictionary of English

  • adj. Not acceptable; not pleasing; not welcome; unpleasant; disagreeable; displeasing; offensive.

from The Century Dictionary and Cyclopedia

  • Not acceptable; not pleasing; not welcome; not such as will be received with pleasure; displeasing.

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

  • adj. not conforming to standard usage
  • adj. not adequate to give satisfaction
  • adj. used of persons or their behavior
  • adj. not acceptable; not welcome


un- +‎ acceptable (Wiktionary)



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