✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

Thousand Islands

geographical name

group of more than 1500 islands and islets in the Saint Lawrence River, some of which belong to Ontario, Canada, and the rest to New York statet

Cite this Entry

“Thousand Islands.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Thousand%20Islands. Accessed 30 Nov. 2025.

More from Merriam-Webster on Thousand Islands

Last Updated: - Definition revised
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!