eccentricity

noun

ec·​cen·​tric·​i·​ty ˌek-(ˌ)sen-ˈtri-sə-tē How to pronounce eccentricity (audio)
plural eccentricities
1
a
: the quality or state of being eccentric
b
: deviation from an established pattern or norm
especially : odd or whimsical behavior
2
a
: a mathematical constant that for a given conic section is the ratio of the distances from any point of the conic section to a focus and the corresponding directrix
b
: the eccentricity of an astronomical orbit used as a measure of its deviation from circularity

Examples of eccentricity in a Sentence

Some people weren't very tolerant of his eccentricity. Talking to her plants is one of her many eccentricities.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Born on January 20, 1946, in Missoula, Montana, David Keith Lynch had a quintessentially American upbringing that belied the eccentricity of his later works. Darryn King, Forbes, 17 Jan. 2025 His character as criminal profiler quickly became a fan favorite with his analytical skills, his eccentricities — and his ever-changing hair. Nellie Andreeva, Deadline, 12 Dec. 2024 As if life weren’t challenging enough already, Evie is going to be navigating this amongst the eccentricity of her family home, living with her fiercely loving single mum Suz (Suranne Jones), sister Izzie (Liv Hill), and handsome boyfriend (sometime man of the house) Josh (Adam Long). Lily Ford, The Hollywood Reporter, 27 Dec. 2024 His eccentricities — once easily dismissed as the affectations of a lonely man — read maniacal. Amanda Whiting, Vulture, 25 Oct. 2024 See all Example Sentences for eccentricity 

Word History

Etymology

borrowed from Medieval Latin excentricitāt-, excentricitās, from ecentricus, excentricus "not having the earth exactly at its center, eccentric entry 1" + Latin -itāt-, -itās -ity

First Known Use

1545, in the meaning defined at sense 1a

Time Traveler
The first known use of eccentricity was in 1545

Dictionary Entries Near eccentricity

Cite this Entry

“Eccentricity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/eccentricity. Accessed 23 Jan. 2025.

Kids Definition

eccentricity

noun
ec·​cen·​tric·​i·​ty ˌek-ˌsen-ˈtris-ət-ē How to pronounce eccentricity (audio)
plural eccentricities
1
a
: the quality or state of being eccentric
b
: something that does not follow an established pattern, norm, or rule
especially : unusual behavior
2
: the amount by which a nearly circular path is not circular
an orbit's eccentricity

More from Merriam-Webster on eccentricity

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