Discuss the meaning of joint tortfeasers?

[Law of Torts] – All persons who aid, or counsel, or direct or join in the committal of a wrongful act, are joint tort-feasors. Persons are not joint tort-feasors merely because their independent wrongful acts have resulted in one damnum. To constitute a joint liability the act complained of must be joint and not separate. The necessary element is the intention to jointly cause the injury to the plaintiff. But when injury is caused to the plaintiff by the independent tort they are not joint tortfeasors as the cause of action against them may become different.