Deviating from the normal or expected course; atypical. His aberrant behavior at the meeting raised concerns among his colleagues.
Departing from an accepted standard, especially in a way that is unusual or problematic. The scientist's aberrant findings were initially met with skepticism by the academic community.
Biology & Medicine: Located in an abnormal position or having an abnormal form; abnormal. The surgeon noted an aberrant right subclavian artery during the procedure.