Epilepsy can also develop as a result of brain damage from other disorders including brain tumors, alcoholism, Alzheimer's disease, strokes, and heart attacks. Epilepsy is also associated with a variety of developmental and metabolic disorders. Other causes include head injury, prenatal injury, and poisoning.
Legal Definition of commerce. 1  1 : the exchange or buying and selling of goods, commodities, property, or services especially on a large scale and involving transportation from place to place : trade 2 â see also commerce clause, Fair Labor Standards Act. 2  2 : the act of engaging in sexual intercourse.
Trade, or commerce, involves the transfer of goods or services from one person or entity to another, often in exchange for money. A network that allows trade is called a market. The original form of trade, barter, saw the direct exchange of goods and services for other goods and services. Barter is trading things without the use of money. Later one side of the barter started to involve precious metals, which gained symbolic as well as practical importance.