Gil·ly·flow·er n.  [Written also gilliflower.] Bot.
 1. A name given by old writers to the clove pink (Dianthus Caryophyllus) but now to the common stock (Matthiola incana), a cruciferous plant with showy and fragrant blossoms, usually purplish, but often pink or white.
 2. A kind of apple, of a roundish conical shape, purplish red color, and having a large core.
 Clove gillyflower, the clove pink.
 Marsh gillyflower, the ragged robin (Lychnis Flos-cuculi).
 Queen's gillyflower, or Winter gillyflower, damewort.
 Sea gillyflower, the thrift (Armeria vulgaris).
 Wall gillyflower, the wallflower (Cheiranthus Cheiri).
 Water gillyflower, the water violet.
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 water gillyflower
      n : a featherfoil of the eastern United States with submerged
          spongy inflated flower stalks and white flowers [syn: American
          featherfoil, Hottonia inflata]