1. 使(一图像)叠映在(另一图像)上;使(图像)叠加
If one image is superimposed on another, it is put on top of it so that you can see the second image through it.
2. 使同样适用于;将…强加于
If features or characteristics from one situation are superimposed onto or on another, they are transferred onto or used in the second situation, though they may not fit.