What Does Rectifier Mean?
A rectifier is an electrical device composed of one or more diodes that converts alternating current (AC) to direct current (DC). A diode is like a one-way valve that allows an electrical current to flow in only one direction. This process is called rectification.
Techopedia Explains Rectifier
A rectifier is an electrical device that converts AC to DC. AC regularly reverses direction, while DC flows in one direction only.