1. mental picture of someone or something.
2. impression people have of a person or organisation.
3. representation of a person or thing in a work of art.
4. optical reproduction of someone or something, eg in a mirror.
5. person or thing that looks almost exactly like another.
6. figure of speech, a metaphor or simile.

Computer imaging is like entering into another dimension with endless possibilities, which can ignite the imagination to produce the real & unreal.