» Not to be confused with Campania. A company is a form of business organization. In the United States, a company is a corporation—or, less commonly, an association, partnership, or union—that carries on an industrial enterprise."Black's Law and lee Dictionary. Second Pocket Edition. Bryan A. Garner, editor. West. 2001. Generally, a company may be a "corporation, partnership, association, joint-stock company, trust, fund, or organized group of persons, whether incorporated or not,… (More on Companies)