Soy (noun)

1. A type of bean, native to East Asia, that is used to make a variety of food products, including soy sauce, tofu, and soy milk.
2. A food product made from soybeans, such as soy sauce, tofu, or soy milk.

Origin:

The word soy is from japanese shōyu, from chinese shi meaning "bean" and yu meaning "oil" or "sauce".

Examples:

1. The soy sauce added flavor to the stir fry.
2. The tofu made from soybeans was a staple in her vegetarian diet.
3. The soy milk was used as a dairy substitute in baking.
4. Soybeans are a major source of protein in many parts of the world.
5. The soy field was ready for harvest.