From WordNet (r) 3.0 (2006):
soy
n 1: a source of oil; used for forage and soil improvement and
as food [syn: soy, soybean, soya bean]
2: erect bushy hairy annual herb having trifoliate leaves and
purple to pink flowers; extensively cultivated for food and
forage and soil improvement but especially for its nutritious
oil-rich seeds; native to Asia [syn: soy, soya,
soybean, soya bean, soybean plant, soja, soja bean,
Glycine max]
3: thin sauce made of fermented soy beans [syn: soy sauce,
soy]
4: the most highly proteinaceous vegetable known; the fruit of
the soybean plant is used in a variety of foods and as fodder
(especially as a replacement for animal protein) [syn: soy,
soybean, soya, soya bean]