The Collaborative International Dictionary of English v.0.48:

Okra \O"kra\, n.
   1. (Bot.) An annual plant (Abelmoschus esculentus syn.
      Hibiscus esculentus), whose green pods, abounding in
      nutritious mucilage, are much used for soups, stews, or
      pickles; gumbo. [Written also ocra and ochra.]
      [1913 Webster]

   2. The pods of the plant okra, used as a vegetable; also, a
      dish prepared with them; gumbo.
      [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Lady's finger \La"dy's fin"ger\,
   1. pl. (Bot.) The kidney vetch, Anthyllis vulneraria;
      called also lady's fingers.
      [1913 Webster]

   2. (Cookery) A variety of small cake of about the dimensions
      of a finger.
      [1913 Webster]

   3. A long, slender variety of the potato.
      [1913 Webster]

   4. (Zool.) One of the branchiae of the lobster.
      [1913 Webster]

   5. (Bot.) A tall coarse annual (Abelmoschus esculentus) of
      Old World tropics widely cultivated in southern U. S. and
      West Indies for its long mucilaginous green pods used as
      basis for soups and stews; it is sometimes placed in the
      genus Hibiscus. [WordNet sense 1]

   Note: different from lady's fingers

   Syn: okra, gumbo, okra plant, Abelmoschus esculentus,
        Hibiscus esculentus.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Abelmoschus esculentus
    n 1: tall coarse annual of Old World tropics widely cultivated
         in southern United States and West Indies for its long
         mucilaginous green pods used as basis for soups and stews;
         sometimes placed in genus Hibiscus [syn: okra, gumbo,
         okra plant, lady's-finger, Abelmoschus esculentus,
         Hibiscus esculentus]