/ Dictionary / Index H half gainer: Meaning and Definition of Find definitions for: half' gain"er Pronunciation: [key] — Diving. Diving. a dive in which the diver takes off facing forward and performs a backward half-somersault, entering the water headfirst and facing the springboard. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. half eagle half-gallon 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