Definition of outlier
1 : a person whose residence and place of business are at a distance <His house was a place of refuge for outliers.>
2 : something (as a geological feature) that is situated away from or classed differently from a main or related body <The island is an outlier on the southeast side of the archipelago.>
3 : a statistical observation that is markedly different in value from the others of the sample <Values that are outliers give disproportionate weight to larger over smaller values.>
First Known Use of outlier
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