Source : Webster's Revised Unabridged Dictionary (1913)

Weird \Weird\, a.
   1. Of or pertaining to fate; concerned with destiny.

   2. Of or pertaining to witchcraft; caused by, or suggesting,
      magical influence; supernatural; unearthly; wild; as, a
      weird appearance, look, sound, etc.

            Myself too had weird seizures.        --Tennyson.

            Those sweet, low tones, that seemed like a weird
            incantation.                          --Longfellow.

   {Weird sisters}, the Fates. [Scot.] --G. Douglas.

   Note: Shakespeare uses the term for the three witches in
         Macbeth.

               The weird sisters, hand in hand, Posters of the
               sea and land.                      --Shak.

Source : WordNet®

Weird Sisters
     n : a group of three goddesses of destiny [syn: {Fates}, {the
         Fates}]