>>71161837>"emo" is more of a dress style than a music styleNo, emo is a musical style, definitely. It's just that emo fashion, particularly post-2000 emo fashion (the mainstream, Hot Topic one), allowed for a broader acceptance of non-emo bands.
But when it comes to emo music itself, you can think of it like pre-shoegaze. For example, although it's 100% not an emo band, Weezer's Pinkerton album is quintessentially emo, both in sound and lyrics.