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.]