Business (noun)

1. A commercial or industrial organization or enterprise.
2. The purchase and sale of goods and services.
3. An individual's or organization's professional or commercial dealings or activities.

Origin:

From middle english bisynesse, from old english bisignesse.

Examples:

1. He started a new business selling handmade crafts.
2. The business of the company is to manufacture and sell automobiles.
3. She has a lot of business experience.
4. The business community is concerned about the new regulations.
5. She was always on top of her business dealings.