department of energy
Department of Energy. The cabinet-level department of the federal government responsible for advising the President on energy policies, plans, and programs, and for providing leadership in achieving efficient energy use, diversity in energy sources, and improved environmental quality.• Headed by the Secretary of Energy, it oversees a comprehensive national energy plan, including the research, development, and demonstration of energy technology; energy conservation; the nuclear-weapons program; and pricing and allocation. — Abbr. DOE.