/ Dictionary / Index G great helm: Meaning and Definition of Find definitions for: great' helm' Pronunciation: [key] — Armor. Armor. helm (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. greathearted great horned owl Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language