The American generation succeeding Generation X. They are named as such due to their coming-of-age at around the turn of the millenium in some way, shape, or form. A realistic time frame would be early 1980s to mid 1990s. Given that 9/11 was the defining moment of this generation, anyone too young to remember or not born yet would be grouped into the Homeland Generation. Some sources put the end of the Millennial Generation as late as 2003, but as I just said, this is an amazingly meaningless definition.
I was 17 and watching the Twin Towers fall from a TV blaring over the rumble of students in my high school cafeteria.
My little cousin born in 1998 was 3 years old, barely out of diapers and will remember 9/11 like I remember the Challenger exploding.
And we're the same generation?
The generation which came of age in the 21st century. They're fond of tattoos and body piercings and spend all of their time exchanging pics of their latest drunken blowout on Facebook or Myspace. They talk constantly on their cell phones even in the bathroom and text messages back and forth even during exams. Reading is a chore unless its the latest entry on a friend's LiveJournal. The only books they have ever read completely are the Harry Potter novels
Overheard a college admnistrator recently "you've got to remember these students are part of the 'millennial generation'. They have the attention span of a gerbil and require constant stimulation."