A specific commercial enterprise or establishment.

“I was left my father's business.”

A person's occupation, work, or trade.

“He is in the motor and insurance businesses.”

Commercial, industrial, or professional activity.

“He's such a poor cook, I can't believe he's still in business!”

Of, to, pertaining to or utilized for purposes of conducting trade, commerce, governance, advocacy or other professional purposes.

“Please do not use this phone for personal calls; it is a business phone.”

Professional, businesslike, having concern for good business practice.

Supporting business, conducive to the conduct of business.