a person or thing situated away or detached from the main body or system:a western outlier in the Andaman archipelago
a person or thing differing from all other members of a particular group or set:an outlier in Faulkner’s body of workthen there are the corporate outliers, people who just don’t fit into the culture of the company
Geology a younger rock formation isolated among older rocks:the Jurassic outlier west of Carlisle
Statistics a data point on a graph or in a set of results that is very much bigger or smaller than the next nearest data point.
outlier in other Oxford dictionaries
Definition of outlier in the US English dictionary