Definition of Portfolio
PMI - "Projects, programs, subportfolios, and operations managed as a group to achieve strategic objectives. See also program and project."
AXELOS - "All the programmes and stand-alone projects being undertaken by an organization, a group of organizations, or an organizational unit."
Portfolio Management Services
Definition of Portfolio Management
PMI - "The centralized management of one or more portfolios to achieve strategic objectives. See also program management and project management."
AXELOS - "Management of Portfolio (MoP) defines portfolio management as: “A coordinated collection of strategic processes and decisions that together enable the most effective balance of organizational change and business as usual.”