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[ek-ster-nal-i-tee] /ˌɛk stərˈnæl ɪ ti/
noun, plural externalities.
the state or quality of being external.
something external; an outward feature.
excessive attention to externals.
an external effect, often unforeseen or unintended, accompanying a process or activity:
to eliminate externalities such as air pollution through government regulation.
1665-75; external + -ity
Related forms
nonexternality, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for externalities
  • The nonprofit also recommends taxing the externalities produced by large-scale, environmentally damaging agribusinesses.
  • The word is externalities, a concept that holds that money is not the only scarcity in the world.
  • From an economic perspective, it is a network externalities story and a credible one.
  • All of which is another way of saying that your neighbors cause externalities.
  • These are externalities that the private sector has difficulty providing.
  • But the externalities and security risks are equally unlimited.
  • Sorry guys-aint got no mind, controlled by externalities, morals can't be had.
  • In this case there are no significant externalities.
  • Some externalities may be too small to justify the paperwork or legislation.
  • Fraud and negative externalities are practically ubiquitous in our economy.
Word Origin and History for externalities



1713, from external + -ity.

Online Etymology Dictionary, © 2010 Douglas Harper
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