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

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

Ouroboros-like, Erdrich is in continual, self-devouring motion and thus presents a kind of constancy of transmutation — identity itself becomes a variable in the endless calculation of renewal. —Literary Hub, 19 Mar. 2026

Seemingly sleepwalking toward a record streak, which has highlighted his constancy, should certainly help. —Joel Lorenzi, New York Times, 13 Mar. 2026

Across cultures and eras, the Moon has symbolized constancy, the comforting cycle of tides, months, fertility, and agriculture. —Alan Bradley, Space.com, 2 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