outsider

noun

1. One who is not part of a community or organization.“While the initiated easily understand the symbols, they are wholly inaccessible to outsiders.”
2. A newcomer with little or no experience in an organization or community.“Seeing the mess professional politicians have made of things is it any wonder the electorate is beginning to prefer outsiders.”
3. A competitor or contestant who has little chance of winning; a long shot“Johnny was an outsider at this years karate tournament, but he still managed to win second place out of sheer determination.”