In Buddhism, Nirvana is the end of suffering, beyond time and space. Nirvana is the goal of all Buddhists.
The Buddha came to understand that all of life is suffering and that suffering was caused by desire. By ending desire, he could end the cycle of suffering and achieve nirvana, the end of suffering.
The way to achieve this was not through extreme denial or extreme indulgence, but by following a path of moderation, the middle way.– Source: Buddhism, World Religions: Almanac, Vol. 1 Edited by Neil Schlager and Jayne Weisblatt; written by J. Sydney Jones and Michael O’Neal, U·X·L, and imprint of Thomson Gale, Page89