/ Dictionary / Index H Haller: Meaning and Definition of Find definitions for: Hal•ler Pronunciation: (Ger. hä'lur), [key] 1708–77, Swiss physiologist, botanist, and writer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hallelujah Halley 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