Source : Webster's Revised Unabridged Dictionary (1913)

Morning-glory \Morn"ing-glo`ry\, n. (Bot.)
   A climbing plant ({Ipom[oe]a purpurea}) having handsome,
   funnel-shaped flowers, usually red, pink, purple, white, or
   variegated, sometimes pale blue. See {Dextrorsal}.

Source : WordNet®

Ipomoea purpurea
     n : pantropical annual climbing herb with funnel-shaped blue,
         purple, pink or white flowers [syn: {common morning glory}]