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

---

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.

---

Example Sentences

See Examples For:

Department of the Interior

While the Department of the Interior has said that they are testing the water, they haven’t publicly shared the results.

From Slate ● Jun. 27, 2026

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, according to communications reviewed by ProPublica and High Country News.

From Salon ● Dec. 4, 2025

It fell to me to fly to Washington, D.C., to address the United States Department of the Interior Committee on National Historic Landmarks.

From "While the World Watched: A Birmingham Bombing Survivor Comes of Age during the Civil Rights Movement" by Carolyn Maull McKinstry