Matrix organization

Matrix organization is an organizational structure in which individuals have both direct line (i.e., functional) reporting relationships as well as responsibilities to work horizontally with other groups in the company.

Definitions

According to Product Manager's Handbook by Gorchels (2nd edition),

Matrix organization. An organizational structure in which individuals have both direct line (i.e., functional) reporting relationships as well as responsibilities to work horizontally with other groups in the company.