/ Dictionary / Index H Hadamard: Meaning and Definition of Find definitions for: Ha•da•mard Pronunciation: (a-da-mar'), [key] 1865–1963, French mathematician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hadal Hadar Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language