So you do know the definition of indie. Then what's with your previous comment? Seems like they are coming from 2 different people!
A game being indie and a developer being indie aren't the exact same thing. Any indie developer can, theoretically, go up to a publisher and have their game released like any other game. At that point it's not indie in the same fashion as a guy who puts his own game up on Steam or Desura or the iOS app store since it went through the gate of a publisher. This is what a lot of mid-sized studios did before so many of them disappeared or got bought during the last console generation. This is what Crytek does when it develops a Crysis game that's published by EA. Microsoft and Sony deciding to essentially publish a lot of indie digital games on PS3 and 360 was kind of a weird thing because it put unnecessary gates into the process. This is what's so different about the ability to self-publish on PS4 and Xbox One. The indie game market on PS3 and Xbox 360 was, honestly, severely gated.
This is not to say Crytek and similar companies are the same as, say, Vlambeer or Capy. They're two different tiers of developer, but neither is able to publish their own games. Before the current wave of indies showed up, companies like Q Entertainment, Insomniac, or Tri-Ace were called "independent." Back then it was a word for full-sized studios not owned by bigger publishers. Now there's really no name for them because so few still exist.
Also, CD Projekt cannot be considered indie because they have their own publishing channels. They are a "developer and publisher". Not an indie developer. Indie developers don't own publishing channels. They self-publish (with or without assistance) on an open/controlled marketplace.
CDP can self-publish... on PC. But the retail versions of the Witcher games were still published by Atari (in the US). Then they had to go get WB to publish the Xbox 360 version of Witcher 2. WB will also be publishing the retail version of Witcher 3. If CDP didn't care about releasing a retail disc they could probably go ahead and self-publish Witcher 3 on PSN, Xbox Live, and PC. In that situation it would, essentially, be an indie game, despite the fact that it has a multi-million dollar budget.
And yes CDP owns GOG, and within GOG it's essentially a first party company (just like Valve is within the Steam marketplace), but that doesn't extend everywhere. That doesn't mean they can publish their own games at retail (they can in Poland, but nowhere else). If any other indie developer suddenly had the capital to run its own game distribution website like GOG or Steam, but were still unable to publish retail console games on their own, would they cease being indie?
Indie isn't really about the size of a team or the size of their projects. It's about the ability to get a game to consumers. In fact, it probably makes less sense to call a developer indie, and more sense to say they release games independently. Crytek released Warframe independently, but it can't release Crysis independently. CDP released the digital PC versions of the Witcher games independently, but not the retail versions. If Platinum games for instance wanted to release a game digitally on next-gen consoles and PC, they could do so independently.