A definition largely irrelevant to the context of the post you quoted, which is clearly using the foremost distinction therein: "not existing before".

And it didnt exist before on the platform you are talking so it's a new release.

Edit: it also has New in the title

The universe doesn't begin and end within the library of the Switch though. The game itself has existed since 2012.

And lol, I was actually just thinking that. Still though, if we're gonna take names literally I'm gonna sue the mofo who sold me that hamburger yesterday, since not only did it not contain ham, but the pineapple it is was neither apple nor from a pine. The nerve! XD

Despite any definition, I'd say that being new on NSW is what matters, because nobody had a Wii U anyway. Wii U obscured all games that are now released on NSW.

It will easily, still selling for $299/399 and pulling more than 200K weekly. Never seen that 

Because Xone is Selling very low. People now realize that there isnt much getting a XOne now. 

Over 5 million people bought NSMBU on Wii U, that's more than most games can ever hope to sell, so it's not like "nobody bought it".

And even if hardly anyone did, that wouldn't change the fact that it was publicly available to own for over 6 years before it's re-release on Switch, so personally I'm still gonna stick with the definition of "new" as a game that hasn't seen release before at all.

Turns out there is still one more week of Media create left! 4gamer just decided to stop early for some reason

Nintendo had a lot of done games that they simply released as new, that's the whole marketing behind those games. For most NSW audience, they're all new games. Wii U was an obscure console for die hard fans, that's why I can say that nobody on the mainstream game audience bought it.

Wii U is an obscure console comparing it with 3DS, DS, Wii, or NSW. Even though sticking to the dictionary definition is all right, I think it doesn't apply to the specific context of this discussion. Yes, the games were factually out before, but it really doesn't matter much in this specific business case.

Just to hammer this point home, the bestselling Switch game is a Wii U port with all it's DLC (although, a huge Spaceship, SSBU, is approaching fast). So there is a large market for it.

More than that, for those who didn't have a Wii U it's brand new, and for those who did and bought it there chances are that they double dip to put their Wii U into retirement, rendering the point nil.