That definition was used for a very short time in the 90s. It's long since settled into "was a teenager in the new millennium", which means born early 80s to late 90s.
Gen Z, also known as iGen, was born in the new millennium.
Gen Z, also known as iGen, was born in the new millennium.
The first time I heard the word millenial was 2017.
This world is weird. But in a world were people can choose their gender freely I think I can have the choice to use that word as I see fit. Feel free to do the same. ;)