1. Two geometric figures are said to be Congruent, or to be in the relation of congruence, if it is possible to superpose one of them on the other so that they coincide

2. Britte earned a patent in 1931 for a side-opening over and under design, and announced it to the world the following year as the "SuperBritte." The "Super" part of the name derives from the French word superpose (over-and-under), but the word fits Britte's gun in more ways than one