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

  • adj. Occurring without periodicity; irregular.
  • adj. Physics Without periodic vibrations.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. That does not recur periodically
  • adj. That does not have a periodic vibration
  • adj. for which any return to it may occur at irregular times; not periodic.

from The Century Dictionary and Cyclopedia

  • Without periodicity.

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

  • adj. not recurring at regular intervals


Sorry, no etymologies found.



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