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

  • adj. Difficult to foretell or foresee: unpredictable test results; unpredictable behavior.
  • n. Something difficult or impossible to foretell or foresee.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Unable to be predicted.
  • n. An unpredictable thing.

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

  • adj. not occurring at expected times
  • adj. not capable of being foretold
  • adj. unknown in advance


un- +‎ predictable (Wiktionary)



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