PSB Training Academy provides law learning materials in Kolkata, India. The document defines tort as a wrongful act under civil law, derived from the Latin word "tortum" meaning twisted or crooked. It distinguishes between three types of tortious acts: malfeasance refers to the actual commission of an unlawful act; misfeasance is the improper performance of a lawful act; and non-feasance is the non-performance of an act that one is legally obligated to perform, such as a doctor failing to treat patients.