The attitude of complete detachment from the experiences of samsara, seeing that there is no true pleasure or satisfaction to be found within it.
One of the Four Unlimited Mind. As one of the chief Buddhist virtues, renunciation leads to a state of "undifferent without pleasure or pain". It is also an equality in mind with no distinction of self and others.
Determination to be free from all problems and SUFFERING (of CYCLIC EXISTENCE), not longer having ATTACHMENT to the pleasures of CYCLIC EXISTENCE which lead to more SUFFERING and DEFILEMENTS. It is inner WISDOM.