noun
1.
a mark left by a healed wound, sore, or burn.
2.
a lasting aftereffect of trouble, especially a lasting psychological injury resulting from suffering or trauma.
3.
any blemish remaining as a trace of or resulting from injury or use.
4.
Botany. a mark indicating a former point of attachment, as where a leaf has fallen from a stem.
verb (used with object), scarred, scarring.
5.
to mark with a scar.
verb (used without object), scarred, scarring.
6.
to form a scar in healing.