Pronunciation: (out"sī'dur), [key]
1. a person not belonging to a particular group, set, party, etc.: Society often regards the artist as an outsider.
2. a person unconnected or unacquainted with the matter in question: Not being a parent, I was regarded as an outsider.
3. a racehorse, sports team, or other competitor not considered likely to win or succeed.
4. a person or thing not within an enclosure, boundary, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.