Source : Webster's Revised Unabridged Dictionary (1913)

Roller \Roll"er\, n.
   1. One who, or that which, rolls; especially, a cylinder,
      sometimes grooved, of wood, stone, metal, etc., used in
      husbandry and the arts.

   2. A bandage; a fillet; properly, a long and broad bandage
      used in surgery.

   3. (Naut.) One of series of long, heavy waves which roll in
      upon a coast, sometimes in calm weather.

   4. A long, belt-formed towel, to be suspended on a rolling
      cylinder; -- called also {roller towel}.

   5. (Print.) A cylinder coated with a composition made
      principally of glue and molassess, with which forms of
      type are inked previously to taking an impression from
      them. --W. Savage.

   6. A long cylinder on which something is rolled up; as, the
      roller of a man.

   7. A small wheel, as of a caster, a roller skate, etc.

   8. (Zo["o]l.) ANy insect whose larva rolls up leaves; a leaf
      roller. see {Tortrix}.

   9. [CF. F. rollier.] (Zo["o]l.) Any one of numerous species
      of Old World picarian birds of the family {Coraciad[ae]}.
      The name alludes to their habit of suddenly turning over
      or ``tumbling'' in flight.

   Note: Many of the species are brilliantly colored. The common
         European species ({Coracias garrula}) has the head,
         neck, and under parts light blue varied with green, the
         scapulars chestnut brown, and the tail blue, green, and
         black. The broad-billed rollers of India and Africa
         belong to the genus {Eurystomus}, as the oriental
         roller ({E. orientalis}), and the Australian roller, or
         dollar bird ({E. Pacificus}). The latter is dark brown
         on the head and neck, sea green on the back, and bright
         blue on the throat, base of the tail, and parts of the
         wings. It has a silvery-white spot on the middle of
         each wing.

Source : WordNet®

roller
     n 1: a grounder that rolls along the infield
     2: a long heavy sea wave as it advances towards the shore [syn:
         {roll}, {rolling wave}]
     3: a small wheel without spokes (as on a roller skate)
     4: a cylinder that revolves
     5: a mechanical device consisting of a cylindrical tube around
        which the hair is wound to curl it; "a woman with her head
        full of curlers is not a pretty sight" [syn: {curler}, {hair
        curler}, {crimper}]
     6: Old World bird that tumbles or rolls in flight; related to
        kingfishers
     7: pigeon that executes backward somersaults in flight or on
        the ground [syn: {tumbler}, {tumbler pigeon}]