Department of the Interior Meaning, Definition & Usage

  1. noun the United States federal department charged with conservation and the development of natural resources; created in 1849
    Interior; Interior Department; DoI.

WordNet

Definitions
  1. that department of the government of the United States which has charge of pensions, patents, public lands and surveys, the Indians, education, etc.; that department of the government of a country which is specially charged with the internal affairs of that country; the home department.

Webster 1913