Source : Webster's Revised Unabridged Dictionary (1913)

Circlet \Cir"clet\, n.
   1. A little circle; esp., an ornament for the person, having
      the form of a circle; that which encircles, as a ring, a
      bracelet, or a headband.

            Her fair locks in circlet be enrolled. --Spenser.

   2. A round body; an orb. --Pope.

            Fairest of stars . . . that crown'st the smiling
            morn With thy bright circlet.         --Milton.

   3. A circular piece of wood put under a dish at table. [Prov.
      Eng.] --Halliwell.

Source : WordNet®

circlet
     n 1: a small circle
     2: decorated metal band worn around the head