Annihilation of the self - Fanaa

Fanaa  is the Sufi term for extinction. It means to annihilate the self, while remaining physically alive. Persons having entered this state are said to have no existence outside of, and be in complete unity with, Allah.

Fanaa is similar to the concepts of nirvana in Buddhism and Hinduism or moksha in Hinduism, which also aim for annihilation of the self. Fanaa may be attained by constant meditation and by contemplation on the attributes of God, coupled with the denunciation of human attributes.

The nature of fanaa consists of the elimination of evil deeds and lowly attributes of the flesh. In other words, fanaa is abstention from sin and the expulsion from the heart of all love other than the Divine Love; expulsion of greed, lust, desire, vanity, show, etc. In the state of fanaa the reality of the true and only relationship asserts itself in the mind. One realizes and feeds that the only real relationship is with Allah Ta'ala fanaa means to destroy your self. if you destroy your self in the love of Allah then that fanaa will convert into entire life means abdi zindgi. and for that one you have to destroy your will and yourself on the will of Allah.

source:wikipedia