Superpose \Su`per*pose"\, 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. 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.