Source : Webster's Revised Unabridged Dictionary (1913)

Poppy \Pop"py\, n.; pl. {Poppies}. [OE. popy, AS. popig, L.
   papaver.] (Bot.)
   Any plant or species of the genus {Papaver}, herbs with showy
   polypetalous flowers and a milky juice. From one species
   ({Papaver somniferum}) opium is obtained, though all the
   species contain it to some extent; also, a flower of the
   plant. See Illust. of {Capsule}.

   {California poppy} (Bot.), any yellow-flowered plant of the
      genus {Eschscholtzia}.

   {Corn poppy}. See under {Corn}.

   {Horn}, or {Horned}, {poppy}. See under {Horn}.

   {Poppy bee} (Zo["o]l.), a leaf-cutting bee ({Anthocopa
      papaveris}) which uses pieces cut from poppy petals for
      the lining of its cells; -- called also {upholsterer bee}.
      

   {Prickly poppy} (Bot.), {Argemone Mexicana}, a
      yellow-flowered plant of the Poppy family, but as prickly
      as a thistle.

   {Poppy seed}, the seed the opium poppy ({P. somniferum}).

   {Spatling poppy} (Bot.), a species of Silene ({S. inflata}).
      See {Catchfly}.

Poppy \Pop"py\, Poppyhead \Pop"py*head`\, n. [F. poup['e]e doll,
   puppet. See {Puppet}.] (Arch.)
   A raised ornament frequently having the form of a final. It
   is generally used on the tops of the upright ends or elbows
   which terminate seats, etc., in Gothic churches.

Source : WordNet®

poppy
     n : annual or biennial or perennial herbs having showy flowers