Department of the Interior

American  

noun

1. the department of the U.S. federal government charged with the conservation and development of the natural resources of the U.S. and its possessions. DOI

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Department of the Interior Cultural  

1. A department of the federal executive branch responsible for the National Park Service, the Bureau of Indian Affairs, and a variety of programs designed to preserve natural resources in the United States and its territories and possessions in the Pacific Ocean.

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Example Sentences

The Department of the Interior said that the turbines may block radar signals External link, based on classified reports.

From Barron's • Jan. 13, 2026

In a statement, the Department of the Interior said it was pausing five large-sale projects to look into how windmills could interfere with radar and create other risks to east coast cities.

From BBC • Dec. 22, 2025

Department of the Interior confirms rumors that have been swirling for weeks.

From Los Angeles Times • Nov. 20, 2025

Throughout the Department of the Interior, which is overseen by Secretary Doug Burgum, there are about 5,800 wildland firefighters in four agencies that have been impacted by cuts.

From Salon • Jul. 24, 2025

The National Park Service, a bureau of the Department of the Interior, prepared to handle the huge crowd that was expected.

From "The Voice That Challenged a Nation: Marian Anderson and the Struggle for Equal Rights" by Russell Freedman