kur·​to·​sis (ˌ)kər-ˈtō-səs How to pronounce kurtosis (audio)
: the peakedness or flatness of the graph of a frequency distribution especially with respect to the concentration of values near the mean as compared with the normal distribution

Word History


Greek kyrtōsis convexity, from kyrtos convex — more at curve

First Known Use

1905, in the meaning defined above

Time Traveler
The first known use of kurtosis was in 1905

Dictionary Entries Near kurtosis

Cite this Entry

“Kurtosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/kurtosis. Accessed 7 Dec. 2023.

More from Merriam-Webster on kurtosis

Love words? Need even more definitions?

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