1
: a narrow strip of land connecting two larger land areas
2
: a narrow anatomical part or passage connecting two larger structures or cavities
Examples of isthmus in a Sentence
Recent Examples on the Web
Radziner designed the upcountry Kula home to showcase sweeping views: an isthmus to the west and, further east, the Haleakalā volcano.
—
R. Daniel Foster, Forbes, 16 Aug. 2024
Restrictions in the Darien Gap, the isthmus that connects South America with Central America, could create a bottleneck in Colombia.
—Nick Miroff, Washington Post, 18 July 2024
One visit is just scratching the surface of the isthmus nation; here are nine ideas for how to spend your next Panamanian holiday.
—Siobhan Reid, Condé Nast Traveler, 16 May 2024
Today in history On this day in 1904, the United States and Panama proclaimed a treaty under which the U.S. agreed to undertake efforts to build a ship canal across the Panama isthmus.
—The Arizona Republic, 26 Feb. 2024
See all Example Sentences for isthmus 
R. Daniel Foster, Forbes, 16 Aug. 2024
Restrictions in the Darien Gap, the isthmus that connects South America with Central America, could create a bottleneck in Colombia.
—Nick Miroff, Washington Post, 18 July 2024
One visit is just scratching the surface of the isthmus nation; here are nine ideas for how to spend your next Panamanian holiday.
—Siobhan Reid, Condé Nast Traveler, 16 May 2024
Today in history On this day in 1904, the United States and Panama proclaimed a treaty under which the U.S. agreed to undertake efforts to build a ship canal across the Panama isthmus.
—The Arizona Republic, 26 Feb. 2024
See all Example Sentences for isthmus
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'isthmus.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near isthmus
Cite this Entry
“Isthmus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isthmus. Accessed 18 Sep. 2024.
Copy CitationKids Definition
isthmus
noun
isth·mus
ˈis-məs 
: a narrow strip of land connecting two larger land areas
Medical Definition
isthmus
noun
isth·mus
ˈis-məs
: a contracted anatomical part or passage connecting two larger structures or cavities: as
a
: an embryonic constriction separating the midbrain from the hindbrain
b
: the lower portion of the uterine corpus
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