Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “isthmus”

isthmus

noun [C]  /ˈɪs·məs/ us  
a narrow piece of land that has water on either side and joins two larger areas of land: the Isthmus of Panama
(Definition of isthmus from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of isthmus?
Add Cambridge dictionaries to your browser to your website

Definitions of “isthmus” in other dictionaries

Word of the Day

pint

a measure for liquid equal to about half a litre

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More