Definitions

1. noun

A property or value that does not change, especially under specified circumstances or in relation to other variables.

“The length of a rectangle is an invariant under rotation.”

2. adjective

Unchanging, especially in the face of change or adversity.

“She remained an invariant presence in the community throughout the economic downturn.”

3. verb

To remain unchanged or unaltered.

“The algorithm invariants the data before processing it.”