1. The person or company responsible for making investments on behalf of, and/or providing advice to, investors.

2. In the context of the mutual fund business, an adviser, also known as an investment adviser, is an organization employed by an investment company to manage a particular fund’s portfolio. A fund’s advisor assigns a manager(s) to make the day-to-day decisions involved in the purchase and sale of a fund’s securities according to stated strategies and investment objectives.