- being or relating to something that is placed over something else, usually characterized by some degree of transparency so that both the background and foreground objects are visible: The title credits appeared over the dusky opening scene in superimposed white text.
- (of a stream or drainage system) having a course not adjusted to the structure of the rocks presently undergoing erosion but determined instead by a prior erosion cycle or by formerly overlying rocks or sediments.
- (of a plant part) growing one over another, but separately, as in layers: The superimposed whorls of petals give these begonia blossoms a roselike appearance.
- the simple past tense and past participle of superimpose.
