Here's the direction the discussion is currently going:
Editing is a task that includes correcting exposure, centering, cropping, sizing, rotating and positioning of the subject within the photograph.
Retouching is an image enhancing task where the following types of activity take place: White balance and colour correction, removal of skin blemishes (spots, scars, etc.), removing marks from clothing (Bride’s dress), removing distractions (lamp-posts and any other items that detract from the overall image), applying effects such as vignettes.
Any comments/agreement/disagreement?
You probably see why I said semantics in the thread title!