/ Dictionary / Index H halloa: Meaning and Definition of Find definitions for: hal•loa Pronunciation: (hu-lō', ha-), [key] — pl. v.i., v.t., -loas, -loaed, -loa•ing. hallo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hallo Hall of Fame Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language