An example of superimpose is when you put a watermark or copyright mark over the top of a picture but the picture underneath is still visible.
transitive verbsu·per·im·posed, su·per·im·pos·ing, su·per·im·pos·es
- To lay or place (something) on or over something else.
- To add as a distinct feature, element, or quality: superimposed her own interpretation when she retold the story.
(third-person singular simple present superimposes, present participle superimposing, simple past and past participle superimposed)
- To place an object over another object, usually in such a way that both will be visible.
- He superimposed the company logo over the image.