Not variable; unalterable; uniform; always having the same value. / (mathematics) Constant.

Something that does not vary; a constant.

invariability; the state of being invariable

plural of invariable

not varying; constant / (mathematics) Unaffected by a specified operation (especially by a transformation) / (computing, programming) Neither covariant nor contravariant.

An invariant quantity, function etc.

The property of being invariant.

Every time; always, without change.

The quality of being invariable

plural of invariant