/ ˌsuːpəˈpəʊz; ˌsjuː-; NAmE ˌsuːpərˈpoʊz/ verb
[ vn ] to put sth on or above sth else :
They had superposed a picture of his head onto someone else's body.
► super·pos·ition noun / -pəˈzɪʃn; NAmE /
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WORD ORIGIN
early 19th cent.: from French superposer , from super- above + poser to place.