coextension

/ˌkoʊɪkˈstɛnʃən/
noun
  1. The state or quality of extending over the same space, time, or range as something else.
    • Linguists study the coextension of meaning across different dialects.
    • The coextension of the two empires led to frequent border disputes.
    • There is a natural coextension between the park and the wildlife refuge.
Antonyms
What does "coextension" mean? | whatsthatwordmean | whatsthatwordmean