Simple past tense and past participle of superimpose.(verb)
Positioned on or above something else, especially in layers(adjective)
Layered or stratified(adjective)
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Use "superimposed" in a sentence
"The design of the patch with the U.S. eagle image superimposed is designed to display a hierarchy in which the U.S. 5th Army exerts its military command under the authority of USNORTHCOM, with its domain defined as all North America, including the U.S.,"
"The combination of his work and mine together, overlapping, superimposed, is brilliant."
"He was looking very thoughtful indeed and the expression superimposed upon the thoughtfulness could hardly be described as pleasant."