Definitions
1.NounIn armour, a large pauldron protecting the shoulder, or a cubitiere protecting the elbow.
2.NounA layer of metal that covers an undercoat.
3.NounA flat protective sheet that covers something
4.NounA tectonic plate that has moved over and covered another tectonic plate.
5.VerbTo form an overplate.
6.VerbTo move on top of and cover another tectonic plate.
7.VerbTo form an overly thick plate on top of something.