Viraga

Virāga: 'disillusion' or 'fading away', detachment; absence of lust, dispassionateness. Appears frequently together with nirodha 'cessation' 1 as a name for Nibbāna, 2 in the contemplations a forming the 4th tetrad in the exercises in awareness or mindfulness of breathing see: ānāpānasati 14, b of the 18 principal insights.
According to Com., it may mean 1 the momentary destruction of phenomena, or 2 the ultimate 'fading away', i.e. Nibbana. In the aforementioned two contemplations, it means the understanding of both, and the path attained by such understanding.
==References==
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952. 
Category:Pali terms