In the sense of computer language, embedding means taking the fundamental code structure (for instance of an image) and putting it into another code object... such as a video. Something that has been embedded into code structure can be separeted from the other code structure, but serves it's function better joined to (or embedded in) the other structure.
embedded system is a system which have embedded software
and computer hardware ,in which the system is deddicated
for a single specific task or part of task.