outliernoun [ C ]
uk/ˈaʊtˌlaɪ.ər//-ɚ/a person, thing, or fact that is very different from other people, things, or facts, so that it cannot be used to draw general conclusions:
People who live past 100 are genetic outliers, whose longevity is unreachable for most of us.
also outlier site a place that is far from the main part of something:
The survey showed about 125 outlier sites up to 100 miles from Chaco.