An Image more often consists of a visual representation, be it digital, mental, verbal, poetic...etc. These representations form how we view and present the world to others and ourselves.
By asking, 'What is an Image', you are already creating a mental image in order to form an answer to this question
What is an Image?
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Poetic Images
Mental Images
Electronic Images
Verbal Images
Digital Images
Technical Images
Real Images
"Images speak for their time"
"Images create and present past, present, and future"
"Images are an experience"