Outlier is a see also of winsorize.
As a noun outlier
is a person or thing away from others or outside its proper place.
As a verb winsorize is
A person or thing away from others or outside its proper place.
(geology) A part of a formation separated from the rest of the formation by erosion.
(statistics) A value in a statistical sample which does not fit a pattern that describes most other data points; specifically, a value that lies 1.5 IQR beyond the upper or lower quartile.
* winsorise, Winsorise (non-Oxford British spelling)
(statistics) To transform statistics of a batch or sample by transforming extreme values.