Irreversibility :: Irreversibility (n.) The state or quality of being irreversible; irreversibleness.
Irreversible :: Irreversible (a.) Incapable of being reversed or turned about or back; incapable of being made to run backward; as, an irreversible engine..
Irreversible :: Irreversible (a.) Incapable of being reversed, recalled, repealed, or annulled; as, an irreversible sentence or decree..
Irreversibleness :: Irreversibleness (n.) The state or quality of being irreversible.