[koh-tur-muh-nuh s]


having the same border or covering the same area.
being the same in extent; coextensive in range or scope.

Also co·ter·mi·nal [koh-tur-muh-nl] /koʊˈtɜr mə nl/.

Origin of coterminous

1790–1800; re-formation of conterminous; see co-
Related formsco·ter·mi·nous·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for coterminous

Historical Examples of coterminous

  • But this time Ive fixed it up for him and his leave is coterminous with mine.

    The Rough Road

    William John Locke

  • The parishes in these counties were ordered to be coterminous with the bounds of the counties.

    How Justice Grew

    Martha W. (Martha Woodroof) Hiden

  • That is the third stage, and it is coterminous with life, Tom.

  • This was subdivided into "realms" coterminous with the boundaries of States.

    Ku Klux Klan

    J. C. Lester

  • But Huckley's sheet was only coterminous with the use of type among mankind.

British Dictionary definitions for coterminous




having a common boundary; bordering; contiguous
coextensive or coincident in range, time, scope, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for coterminous

1630s, malformed in English from co- + terminous (see terminal). Latin purists prefer conterminous.

Online Etymology Dictionary, © 2010 Douglas Harper