Origin: Germanic Old English prefix
Outsider has 3 different meanings across 1 category:
a contestant (human or animal) not considered to have a good chance to win
"The underdog horse was treated as an outsider by everyone at the track, yet it somehow managed to take the lead in the final stretch."
One who is not part of a community or organization.
"As an outsider, I was invited to observe the village council meeting but wasn't allowed to vote on any decisions."