/ Dictionary / Index H hi: Meaning and Definition of Find definitions for: hi Pronunciation: (hī), [key] — interj. (used as an exclamation of greeting); hello! hi Pronunciation: (hī), [key] — adj. an informal, simplified spelling ofhi fidelity. HI Pronunciation: [key] Hawaii (approved esp. for use with zip code). H.I. Pronunciation: [key] Hawaiian Islands. heat index. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hi (Thesaurus) HHS Hialeah Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language