'Irreversible' definitions:

Definition of 'irreversible'

From: WordNet
adjective
Incapable of being reversed; "irreversible momentum toward revolution" [ant: reversible]

Definition of 'Irreversible'

From: GCIDE
  • Irreversible \Ir`re*vers"i*ble\, a.
  • 1. Incapable of being reversed or turned about or back; incapable of being made to run backward; as, an irreversible engine; an irreversible process; an irreversible reaction. [1913 Webster +PJC]
  • 2. Incapable of being reversed, recalled, repealed, or annulled; as, an irreversible sentence or decree. [1913 Webster]
  • This rejection of the Jews, as it is not universal, so neither is it final and irreversible. --Jortin.
  • Syn: Irrevocable; irrepealable; unchangeable. [1913 Webster]