1
: not rotating or involving rotation
2
: free of vortices
irrotational flow

Word History

First Known Use

1875, in the meaning defined at sense 1

Time Traveler
The first known use of irrotational was in 1875

Browse Nearby Words

Cite this Entry

“Irrotational.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/irrotational. Accessed 4 Apr. 2025.

Love words? Need even more definitions?

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