'Invariant' definitions:
Definition of 'invariant'
From: WordNet
adjective
Unaffected by a designated operation or transformation
adjective
Unvarying in nature; "maintained a constant temperature"; "principles of unvarying validity" [syn: changeless, constant, invariant, unvarying]
noun
A feature (quantity or property or function) that remains unchanged when a particular transformation is applied to it
Definition of 'Invariant'
From: GCIDE
- Invariant \In*va"ri*ant\, n. (Math.) An invariable quantity; specifically, a function of the coefficients of one or more forms, which remains unaltered, when these undergo suitable linear transformations. --J. J. Sylvester. [1913 Webster]