externality

/ˌɛkstərˈnæləti/
noun
  1. A side effect or consequence of an activity that affects other people without being reflected in the cost or price of that activity.
    • The government introduced a tax to address the negative externality of carbon emissions.
    • Pollution from the factory is a negative externality that harms the nearby community.
    • When you get a vaccination, you create a positive externality by helping protect others from disease.
  2. The quality or state of being external or outside.
    • The externality of the threat made it hard for the team to control.
    • The externality of the noise meant it came from outside the building.
    • Philosophers debate the externality of the physical world versus our perception of it.
Antonyms
What does "externality" mean? | whatsthatwordmean | whatsthatwordmean