v. t. [ imp. & p. p. Superposed p. pr. & vb. n. Superposing. ] [ F. superposer. See Super-, and Pose. ] 1. To lay upon, as one kind of rock on another. [ 1913 Webster ]

2. (Geom.) To lay (a figure) upon another in such a manner that all the parts of the one coincide with the parts of the other; as, to superpose one plane figure on another. [ 1913 Webster ]