/ Dictionary / Index D Day of Infamy: Meaning and Definition of Find definitions for: Day' of In'famy Pronunciation: [key] December 7, 1941, on which Japan attacked Pearl Harbor, bringing the United States into World War II: so referred to by President Franklin D. Roosevelt in his speech to Congress the next day, asking for a declaration of war on Japan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Day of Atonement Day of Judgment Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language