A group of segments making up a whole.
Television programs are series made up of episodes.

The World series is comprised of a number of games.
by Downstrike May 23, 2004
A summation of infinitely many things
The series 9/10 + 9/100 + 9/1000 + 9/10000 + ... = 1, so 0.999... repeating equals 1.
by sw3aterCS October 28, 2020
incredibly awesome or powerful person; a famous person; a religious leader
many Christians might see Jesus as a SERI
by Brad Slocum October 10, 2003
The Italian Football league which is simply the best football league in the world as it emphasizes skill and teamwork over flashiness.

Some people like to complain it's too boring purely because they prefer goals over skill. These people are usually ignorant Premier League fans who aren't true football fans and think scoring goals is all there is to football.
Ignorant Premier League Fan - Defence? What's that?
by Forza Italia December 8, 2004
A cuter word for serious that makes more sense than others.
Stop tickling me now I'm Series!
by bubblekittykat October 3, 2018