constancy

noun

con·​stan·​cy ˈkän(t)-stən(t)-sē 

plural constancies

1

a

: steadfastness of mind under duress : fortitude

b

: fidelity, loyalty

2

: a state of being constant or unchanging

Synonyms of constancy

• stability
• consistency

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

Michael was saved to some degree by the love and constancy of his mother Katherine, played with touching warmth in a gorgeous performance from Nia Long. —David Rooney, HollywoodReporter, 21 Apr. 2026

Presidents back then had constancy of purpose, even if not always correct policies. —Edward Lotterman, Twin Cities, 5 Apr. 2026

The speed, urgency, and constancy of online life amplifies extremism because posting, replying, and generally participating in the discourse is its own virtue enrobing all the rest, an internet-maxxing to rule all the others. —Ian Bogost, The Atlantic, 31 Mar. 2026

But for the nostalgia lover, the real story of Lupie’s is one of constancy in a city defined by change. —Charlotte Observer, 20 Mar. 2026

Word History

First Known Use

1523, in the meaning defined at sense 1a

Rhymes for constancy

• inconstancy

Kids Definition

constancy

noun

con·​stan·​cy ˈkän(t)-stən-sē 

plural constancies

1

: firmness and loyalty in one's beliefs or personal relationships

2

: freedom from change