department of transportation(n = noun.group) dot, transportation - the United States federal department that institutes and coordinates national transportation programs; created in 1966; Array
is a kind of executive department
has parts: faa, federal aviation agency, transportation security administration, tsa, u. s. coast guard, united states coast guard, us coast guard

academic department, advertising department, agriculture department, air transportation, air transportation system, anthropology department, art department, biology department, building department, business department, chemistry department, commerce department, defense department, department, department head, department of agriculture, department of anthropology, department of biology, department of chemistry, department of commerce, department of commerce and labor, department of computer science, department of corrections, department of defense, department of defense laboratory system, department of economics, department of education, department of energy, department of energy intelligence, department of english, department of health and human services, department of health education and welfare, department of history, department of housing and urban development, department of justice, department of justice canada, department of labor, department of linguistics, department of local government, department of mathematics, department of music, department of philosophy, department of physics, department of psychology, department of sociology, department of state, department of the federal government, department of the interior, department of the treasury, department of veterans affairs, department store, economics department, editorial department, education department, energy department, english department, executive department, federal department, fire department, government department, history department, interior department, justice department, labor department, linguistics department, local department, mathematics department, ministry of transportation test, music department, navy department, parts department, payroll department, personnel department, philosophy department, physics department, plant department, police department, psychology department, purchasing department, sales department, sanitation department, secretary of state for the home department, secretary of transportation, security department, service department, sociology department, state department, subsistence department, transportation, transportation company, transportation secretary, transportation security administration, transportation system, treasury department, united states department of defense, united states department of state, war department