Does Nibbana mean not self?

I have found a text which states that > nibbāna is a description meaning not-self. The meaning of the text is clear. Nibbana is nothing but not-self. Moreover I have also found a sutta(SN22.45) which says that after understanding and realizing not-self the person attains Nirvana. > At Savatthi. “Bhikkhus, form is impermanent. What is impermanent is > suffering. What is suffering is nonself. What is nonself should be > seen as it really is with correct wisdom thus: ‘This is not mine, this > I am not, this is not my self.’ When one sees this thus as it really > is with correct wisdom, the mind becomes dispassionate and is > liberated from the taints by nonclinging . . . > “By being liberated, it is steady; by being steady, it is content; by > being content, he is not agitated. Being unagitated, he personally > attains Nibbāna. My question is :Does Nibbana mean not self?