der ‧ ma ‧ bra ‧ sion /ˌdɜːməˈbreɪʒ ə n $ ˌdɜːr-/ BrE AmE noun [uncountable and countable] medical
a type of ↑ surgery that removes the top layers of someone’s skin in order to make the skin below look smoother and to make new skin healthier. This is often done to repair ↑ scar s caused by an accident or by previous surgery.