What is an Emo?

I posted the definition of a Goth so how about a definition of what is an emo.  My opinion of what is emo and yours are most likely different, so lets just see what wikipedia say!

Starting in the mid-1990s, the term emo began to refer to the indie scene that followed the influences of Fugazi, which itself was an offshoot of the first wave of emo. Bands including Sunny Day Real Estate and Texas Is the Reason had a more indie rock style of emo, more melodic and less chaotic.

The so-called "indie emo" scene survived until the late 1990s, as many of the bands either disbanded or shifted to mainstream styles. As the remaining indie emo bands entered the mainstream, newer bands began to emulate the mainstream style. As a result, the term "emo" became a vaguely defined identifier rather than a specific genre of music.