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Definition of externality
externalities
1 : the quality or state of being external or externalized
2 : something that is external
3 : a secondary or unintended consequence pollution and other externalities of manufacturing
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Recent Examples of externality from the Web
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Economists recommend governments use taxes and regulations to minimize this negative externality.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'externality'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of externality
1673
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