coextensive

See also: co-extensive

English

Alternative forms

• co-extensive

Etymology

From co- +‎ extensive.

Pronunciation

• (UK) IPA^(key): /ˌkəʊ.ɪkˈstɛn.sɪv/
• (US) IPA^(key): /ˌkoʊ.ɛkˈstɛn.sɪv/

Adjective

coextensive (not comparable)

1. Having the same spatial limits or boundaries; sharing the same area.

   The city and county of San Francisco are coextensive.

2. Occurring over the same period of time; contemporaneous.
   • 1946, Bertrand Russell, History of Western Philosophy, I.30:

     His life is almost co-extensive with one of the most disastrous periods in Roman history.

3. (logic) Having the same extension—the object or set of objects to which a term refers.
   • 1995, Jaegwon Kim, Ernest Sosa, A Companion to Metaphysics‎^[1]:

     Coextensive expressions with different intensions cannot in general be substituted for one another within an expression e while preserving the extension of e (assuming that the extension of a declarative sentence is its truth value).

Related terms

• coterminous
• extensive