/ Dictionary / Index H head sea: Meaning and Definition of Find definitions for: head' sea' Pronunciation: [key] — Naut. Naut. a formation of waves running in a direction opposite to that of a vessel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. headsaw headset Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language