co·​ter·​mi·​nous (ˌ)kō-ˈtər-mə-nəs How to pronounce coterminous (audio)
: having the same or coincident (see coincident sense 2) boundaries
a voting district coterminous with the city
: coextensive in scope or duration
… an experience of life coterminous with the years of his father.Elizabeth Hardwick
coterminously adverb

Examples of coterminous in a Sentence

the Alfred Lunt–Lynn Fontanne partnership was more or less coterminous with Broadway's golden age Massachusetts' Nantucket County isn't quite coterminous with the island of the same name, as the county includes two small nearby islets.
Recent Examples on the Web Tohoku then is coterminous with the former Emishi region. Razib Khan, Discover Magazine, 24 Mar. 2011 Although time was still widely regarded as fluid and coterminous with eternity, the monastery was governed by the rhythms of that most modern instrument: the clock. Meghan O’Gieblyn, Harper’s Magazine , 4 Jan. 2022 Which means that on the starboard side of American politics, the Overton window has now shifted far beyond the boundaries of democratic self-government to a place broadly coterminous with fascism. Damon Linker, The Week, 28 July 2021 Its onset in the late 16th century was particularly noticeable in Anatolia, a largely rural region that once formed the heartland of the Ottoman Empire and is roughly coterminous with modern-day Turkey. Andrea Duffy, The Conversation, 7 June 2021 Stan had a massive share in that, but SLM wasn’t coterminous with his own self — something that would come back to bite him later. Abraham Riesman, Vulture, 12 Feb. 2021 But low-lying parishes such as Orleans, which is coterminous with New Orleans city, also prepare to shelter those who can’t afford hotels, don’t have cars, or have disabilities that makes evacuation more precarious. Sarah Gibbens, National Geographic, 25 Aug. 2020 Until the end of the 19th century, Kings County, the county coterminous with Brooklyn, was the second-largest provider of produce in the country, according to the BHS. Nora McGreevy, Smithsonian Magazine, 30 July 2020 Our ability to transform patterns of human energy use is coterminous with our ability to imagine a different economy, a different model of human enterprise and togetherness. Aaron Timms, The New Republic, 18 May 2020 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'coterminous.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


alteration of conterminous

First Known Use

1799, in the meaning defined at sense 1

Time Traveler
The first known use of coterminous was in 1799

Dictionary Entries Near coterminous

Cite this Entry

“Coterminous.” Dictionary, Merriam-Webster, Accessed 11 Dec. 2023.

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