outsider

US /ˌaʊtˈsaɪ.dɚ/
UK /ˌaʊtˈsaɪ.dɚ/
"outsider" picture
1.

a person who is not part of a particular group, organization, or community

:
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As an outsider, he found it hard to understand their traditions.
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The new student felt like an outsider in the class.
:
strangeralienforeignernewcomer
:
insidermember
2.

a competitor or contestant thought to have little chance of winning a race or competition

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The horse was a complete outsider, but it won the race.
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No one expected the outsider team to reach the finals.
:
underdoglong shotdark horse
:
favoritefrontrunner
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outsideoutside ofthink outside the box