Definition: The word lesion is a catch-all phrase in dermatology used to point out a rash. Basically, it means "that thing you see." Usually a lesion is a discrete part of the rash.
For example, a mole is a lesion. Someone with many moles has many lesions. Someone with hives has many wheals - each one of these wheals is a lesion.
Pronunciation: LEE-zshun (noun)
