invariant

adjective

in·​vari·​ant (ˌ)in-ˈver-ē-ənt 

: constant, unchanging

specifically : unchanged by specified mathematical or physical operations or transformations

invariant factor

invariant noun

Synonyms of invariant

• unchanging
• steady
• unchangeable
• uniform

Examples of invariant in a Sentence

an invariant value

Recent Examples on the Web

That makes three-coloring a knot invariant. —Erica Klarreich, Quanta Magazine, 22 Apr. 2026

These orientation fields act as a smooth scaffold for interaction, allowing tasks to be expressed as simple, shape-invariant actions like sliding or probing. —Jijo Malayil, Interesting Engineering, 22 Apr. 2026

All models are highly ISO-invariant above ISO 800, thanks to a dual gain switch, which enables flexible shadow recovery without noise penalties. —James Abbott, Space.com, 25 Feb. 2026

To build the therapy, researchers took human stem cells and turned them into a special type of immune cell called an invariant natural killer T cell (NKT cell). —Khloe Quill, FOXNews.com, 1 Dec. 2025

Word History

First Known Use

1874, in the meaning defined above

Phrases Containing invariant

• invariant be

Rhymes for invariant

• variant
• aperient
• covariant

Kids Definition

invariant

adjective

in·​vari·​ant (ˈ)in-ˈver-ē-ənt 

-ˈvar-

: not changing or altering

invariant noun