Department of Defense

American  

noun

1. the department of the U.S. federal government charged with ensuring that the military capacity of the U.S. is adequate to safeguard the national security. DOD

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Department of Defense Cultural  

1. A department of the federal executive branch entrusted with formulating military policies and maintaining American military forces. Its top official is the civilian secretary of defense. It is headquartered in the Pentagon.

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Example Sentences

See Examples For:

Department of Defense

Department of Defense will be charged with deploying the assets into the country, Rubio said.

From Los Angeles Times ● Jun. 25, 2026

The senior White House official said the move was about model safety and the Department of Defense wasn’t heavily involved.

From The Wall Street Journal ● Jun. 13, 2026

Meanwhile, despite Anthropic's ongoing lawsuit against the US Department of Defense over its refusal to accept government use of its AI tools, US government agencies have been testing Mythos too.

From BBC ● Jun. 9, 2026

Department of Defense announced a new multi-billion dollar contract with the computer maker.

From Barron's ● May 28, 2026

Dear Nettie, The only piece of mail Mr. ever put directly in my hand is a telegram that come from the United States Department of Defense.

From "The Color Purple" by Alice Walker