/ Dictionary / Index D Department of the Treasury: Meaning and Definition of Find definitions for: Depart'ment of the Treas'ury Pronunciation: [key] the department of the U.S. federal government that collects revenue and administers the national finances. Abbr.: TD Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Department of the Interior Department of Transportation Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language