su ‧ per ‧ im ‧ pose /ˌsuːpərɪmˈpəʊz $ -ˈpoʊz/ BrE AmE verb [transitive]
1 . to put one picture, image, or photograph on top of another so that both can be partly seen
superimpose something on/onto something
A photo of a cup of cappuccino had been superimposed on a picture of Venice.
2 . to combine two systems, ideas, opinions etc so that one influences the other
superimpose something on/onto something
Eastern themes superimposed onto Western architecture
—superimposition /ˌsuːpərɪmpəˈzɪʃ ə n/ noun [uncountable]