constancy

noun

con·​stan·​cy ˈkän(t)-stən(t)-sē How to pronounce constancy (audio)
plural constancies
1
a
: steadfastness of mind under duress : fortitude
2
: a state of being constant or unchanging

Examples of constancy in a Sentence

the constancy of the Earth's rotation the mistaken notion that there is constancy in language—words do indeed change their meanings over time
Recent Examples on the Web
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There’s no chance viewers will overlook the physical toll demanded of these young men in order to be called Marines, and the intensity of that commitment is marked by its constancy as well as its consequences. Ben Travers, IndieWire, 9 Oct. 2025 In February, the V-JEPA team reported how their systems did at understanding the intuitive physical properties of the real world — properties such as object permanence, the constancy of shape and color, and the effects of gravity and collisions. Quanta Magazine, 3 Oct. 2025 Yet the works transcend this topicality: The collected objects were not only symbols of dilapidation but reminders of the constancy and omnipresence of death. Edna Bonhomme, Artforum, 1 Oct. 2025 This assessment, though probably true of celebrity figures in general, strikes me as especially apt in Sheen’s case, if only thanks to his constancy in our media landscape over the past four decades. Naomi Fry, New Yorker, 20 Sep. 2025 See All Example Sentences for constancy

Word History

First Known Use

15th century, in the meaning defined at sense 1a

Time Traveler
The first known use of constancy was in the 15th century

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Cite this Entry

“Constancy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/constancy. Accessed 18 Oct. 2025.

Kids Definition

constancy

noun
con·​stan·​cy ˈkän(t)-stən-sē How to pronounce constancy (audio)
plural constancies
1
: firmness and loyalty in one's beliefs or personal relationships
2
: freedom from change

More from Merriam-Webster on constancy

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