seaboard

plural seaboards · alternative obsolete seabord

1. The area bordering the sea; a coastline; a sealine.

   Recently the Great Northern Railway, U,S.A., which has a considerable mileage of line bordering the Pacific seaboard, has put in service mobile equipment for applying anti-corrosion treatment to rails.

   1951 October, “Preventing Rail Corrosion”, in Railway Magazine, page 648

   1 more example

   While De Anza was exploring the Bay of San Francisco, seeking a site for the presidio, the American colonists on the eastern seaboard, three thousand miles away, were celebrating the signing of the Declaration of Independence.

   1948, Carey McWilliams, North from Mexico / The Spanish-Speaking People of The United States, J. B. Lippincott Company, page 25