soy(n = noun.plant) glycine max, soja, soja bean, soya, soya bean, soybean, soybean plant - 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; Array
soy(n = noun.food) soya, soya bean, soybean - 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); Array
A Chinese and Japanese liquid sauce for fish, etc., made by subjecting boiled beans (esp. soybeans), or beans and meal, to long fermentation and then long digestion in salt and water. [1913 Webster]