/ Dictionary / Index H helo: Meaning and Definition of Find definitions for: hel•o Pronunciation: (hel'ō, hē'lō), [key] — pl. hel•os. helicopter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. helmsman Héloïse Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language