One that commits a tort.
Origin of tortfeasorMiddle French tortfaiseur wrongdoer tort wrong, injury ( from Old French; see tort . ) faiseur doer ( from Old French) ( faire, fais- to do ; see feasible . ) ( -eur -er, -or ; see -or 1. )
tortfeasor - Legal Definition
A person who commits a tort; a wrongdoer.