Dictionary.com
definitions

Department of Transportation

noun
  1. the department of the U.S. federal government that coordinates and institutes national transportation programs. Abbreviation: DOT
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
department of transportation in Culture

Department of Transportation

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.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.