The Collaborative International Dictionary of English v.0.48:
Tortious \Tor"tious\, a. [From Tort.] 1. Injurious; wrongful. [Obs.] "Tortious power." --Spenser. [1913 Webster] 2. (Law) Imploying tort, or privat injury for which the law gives damages; involing tort. [1913 Webster]WordNet (r) 3.0 (2006):
tortious adj 1: of or pertaining to the nature of a tort; "tortious acts"