Webster's Revised Unabridged Dictionary · 1913

Seaboard

Seaboard , noun

[Sea + board, French bord side.]

The seashore; seacoast. — Ld. Berners

Seaboard , adjective

Bordering upon, or being near, the sea; seaside; seacoast; as, a seaboard town.

Seaboard , adverb

Toward the sea. [Rare]