The Collaborative International Dictionary of English v.0.48:

Morning-glory \Morn"ing-glo`ry\, n. (Bot.)
   A climbing plant (Ipomoea purpurea) having handsome,
   funnel-shaped flowers, usually red, pink, purple, white, or
   variegated, sometimes pale blue. See Dextrorsal.
   [1913 Webster]