Dictionary.com
Thesaurus.com

Department of Transportation

American  

noun

  1. the department of the U.S. federal government that coordinates and institutes national transportation programs. DOT

Department of Transportation Cultural  

  1. A department of the federal executive branch responsible for the national highways and for railroad and airline safety. It also manages Amtrak, the national railroad system, and the Coast Guard.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Part of the Kuihelani Highway on Maui was temporarily closed overnight due to "fast moving water", the Hawaii Department of Transportation posted on X, but had reopened by Sunday.

From BBC • Mar. 22, 2026

Department of Transportation proposed modifying two federal vehicle-safety rules to accommodate Tesla and other companies developing robotaxis.

From MarketWatch • Mar. 17, 2026

The Department of Transportation said it is committed to making sure taxpayer dollars are spent responsibly.

From The Wall Street Journal • Mar. 17, 2026

The air-taxi business got a boost on Monday after the Department of Transportation unveiled selections for its pilot program for testing next-generation aircraft in American skies.

From Barron's • Mar. 9, 2026

The Hideout is a dive bar made of wooden planks that's nestled between a factory and some Department of Transportation building.

From "Will Grayson, Will Grayson" by John Green and David Levithan

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.