Source : Webster's Revised Unabridged Dictionary (1913)

Headband \Head"band`\, n.
   1. A fillet; a band for the head. ``The headbands and the
      tablets.'' --Is. iii. 20.

   2. The band at each end of the back of a book.

Source : WordNet®

headband
     n : a band worn around or over the head; "the earphones were
         held in place by a headband"