/ Dictionary / Index S seamark: Meaning and Definition of Find definitions for: sea•mark Pronunciation: (sē'märk"), [key] — n. a conspicuous object on land, visible from the sea, serving to guide or warn mariners, as a beacon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. seamanship seam binding 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