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Added 9 October 2026

coterminous

/kəˈtəː.mɪ.nəs/ adjective

Latin root: conterminus Wiktionary

adjective Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about coterminous at Wordnik → Where our words come from →

Having matching boundaries; or, adjoining and sharing a boundary.
New York's borough of Brooklyn and Kings County are coterminous.
Having the same scope, range of meaning, or extent in time.
Said of linked or related property leases that expire together.

Origin

From Latin conterminus, from con- (“with”) + terminus (“border, end”), equivalent to co- + terminous. The spelling with co- instead of con- is probably influenced by the related prefix co-.

From Wiktionary, via Kaikki.org (CC BY-SA)

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