externality Hear it!

externality definition

ex·ter·nal·ity (eks′tər nal′ə tē)

noun

  1. the quality or state of being external
  2. pl. externalities -·ties an external thing

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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