'''''The Definitive Nine Inch Nails''''' (usually referred to as '''''The Definitive NIN''''') is a four-part collection of [[Nine Inch Nails]]' greatest hits. The first three parts were originally released as a three-disc volume collection via BitTorrent in 2005.
These were later expanded and a fourth part was added via the nin:access iPhone app and the "Listen" section of [[nin.com]]. They were again modified each time as they were posted on the official NIN SoundCloud account, [[Trent Reznor]]'s official Spotify account and the official NIN Beats Music account before it was absorbed by Apple Music.