1. a plate or panel attached to the back of something, such as a piece of armor, machinery, or furniture, for protection, support, or structural integrity
2. in armor, a piece of plate armor that protects the back of the torso
Usage: historical
3. a metal or plastic plate mounted on a wall or surface to which electrical outlets, switches, or fixtures are attached
Usage: construction, electrical

Examples

• The knight's backplate was dented from the battle.
• The electrical backplate holds the outlet securely in place.
• The machinery's backplate prevents dust from entering the internal components.
• She installed a decorative backplate behind the light switch.
• The backplate of the armor was reinforced with additional steel.
• The backplate provides structural support for the entire assembly.