A more thorough explanation:

Definition: Oblivion refers to the act or state of forgetting or being forgotten. It can also refer to an official pardon or amnesty for an offense.

1. After a long day at work, I fell into a deep oblivion of sleep.

2. The once-famous singer had fallen into oblivion and was now unknown to most people.

3. The government granted an act of oblivion, pardoning all those who had committed minor offenses during the protest.

The first example illustrates the act of forgetting, where the person falls into a deep sleep and forgets everything else. The second example shows the state of being forgotten, where the singer was once famous but is now unknown to most people. The third example illustrates the official pardon or amnesty for an offense, where the government granted an act of oblivion to those who had committed minor offenses during the protest.