1. the state of being completely forgotten or unknown: a former movie star now in oblivion.
2. the state of forgetting or of being oblivious : the oblivion of sleep.
3. the act or process of dying out; complete annihilation or extinction: If we don’t preserve their habitat, the entire species will pass into oblivion.
4. Archaic. official disregard or overlooking of offenses; pardon; amnesty.