Literally, to set above; hence, to make void, inefficacious or useless by superior power, or by coming in the place of; to set aside; to render unnecessary; to suspend. The use of artillery in making breaches in walls, has superseded the use of the battering ram. The effect of passion is to supersede the workings of reason. Nothing is supposed that can supersede the known laws of natural motion.

To come or be placed in the room of; hence, to displace or render unnecessary; as, an officer is superseded by the appointment of another person.