/ Dictionary / Index S seacock: Meaning and Definition of Find definitions for: sea•cock Pronunciation: (sē'kok"), [key] — n. Naut. a valve in the hull of a vessel for admitting outside water into some part of the hull, as a ballast tank. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seacoast sea cow Related Content Daily Word Quiz: ounterfeit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language