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

Farley also addressed The Wall Street Journal’s recent report that Ford secured a contract with the Department of Defense to build prototype tactical trucks.

From The Wall Street Journal ● Jul. 28, 2026

This past weekend’s “CBS Sunday Morning” featured a segment from national security correspondent David Martin about the Department of Defense interfering with the editorial independence of Stars & Stripes, the military newspaper.

From Los Angeles Times ● Jul. 8, 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

Initially, the US Department of Defense oversaw space matters, but President Eisenhower saw the need for a civilian space agency.

From "Women in Space" by Karen Bush Gibson