From WordNet (r) 3.0 (2006) [wn]:
gumbo
n 1: any of various fine-grained silty soils that become waxy
and very sticky mud when saturated with water [syn:
gumbo, gumbo soil]
2: 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]
3: long mucilaginous green pods; may be simmered or sauteed but
used especially in soups and stews [syn: gumbo, okra]
4: a soup or stew thickened with okra pods
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gumbo \Gum"bo\ (g[u^]m"b[-o]), n. [Written also gombo.]
1. A soup thickened with the mucilaginous pods of the okra;
okra soup. Especially, A thick stew made with chicken
(chicken gumbo), or seafood (seafood gumbo), thickened
with okra or file, and also containing greens and often
hot spices; it is particularly popular in Louisiana.
[1913 Webster]
2. The okra plant or its pods.
[1913 Webster]