Source : Webster's Revised Unabridged Dictionary (1913)

Scar \Scar\, n. [Scot. scar, scaur, Icel. sker a skerry, an
   isolated rock in the sea; akin to Dan. ski[ae]r, Sw. sk["a]r.
   Cf. {Skerry}.]
   An isolated or protruding rock; a steep, rocky eminence; a
   bare place on the side of a mountain or steep bank of earth.
   [Written also {scaur}.]

         O sweet and far, from cliff and scar, The horns of
         Elfland faintly blowing.                 --Tennyson.

Scar \Scar\, n. [L. scarus, a kind of fish, Gr. ska`ros.]
   (Zo["o]l.)
   A marine food fish, the scarus, or parrot fish.

Scar \Scar\, n. [OF. escare, F. eschare an eschar, a dry slough
   (cf. It. & Sp. escara), L. eschara, fr. Gr. ? hearth,
   fireplace, scab, eschar. Cf. {Eschar}.]
   1. A mark in the skin or flesh of an animal, made by a wound
      or ulcer, and remaining after the wound or ulcer is
      healed; a cicatrix; a mark left by a previous injury; a
      blemish; a disfigurement.

            This earth had the beauty of youth, . . . and not a
            wrinkle, scar, or fracture on all its body. --T.
                                                  Burnet.

   2. (Bot.) A mark left upon a stem or branch by the fall of a
      leaf, leaflet, or frond, or upon a seed by the separation
      of its support. See Illust.. under {Axillary}.

Scar \Scar\, v. t. [imp. & p. p. {Scarred}; p. pr. & vb. n.
   {Scarring}.]
   To mark with a scar or scars.

         Yet I'll not shed her blood; Nor scar that whiter skin
         of hers than snow.                       --Shak.

         His cheeks were deeply scarred.          --Macaulay.

Scar \Scar\, v. i.
   To form a scar.

Source : WordNet®

scar
     v : mark with a scar; "The skin disease scarred his face
         permanently" [syn: {mark}, {pock}, {pit}]
     [also: {scarring}, {scarred}]

scar
     n 1: a mark left (usually on the skin) by the healing of injured
          tissue [syn: {cicatrix}, {cicatrice}]
     2: an indication of damage [syn: {scratch}, {scrape}, {mark}]
     [also: {scarring}, {scarred}]