An act that constitutes a tort.
Law Dictionary – Alternative Legal Definition
Wrongful; of the nature of a tort. Formerly certain modes of conveyance (e.g., feoffments, fines, etc.) had the effect of passing not merely the estate of the person making the conveyance, but the whole fee simple, to the injury of the person really entitled to the fee; and they were hence called “tortious conveyances.” Litt.