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[see-bawrd, -bohrd] /ˈsiˌbɔrd, -ˌboʊrd/
the line where land and sea meet.
a region bordering a seacoast:
the Eastern seaboard.
bordering on or adjoining the sea.
Origin of seaboard
1350-1400 for earlier sense “porthole cover”; 1480-90 in phrases at, on, to seaboard on the seaward side; 1815-25 for def 1; Middle English seebord. See sea, starboard
Related forms
interseaboard, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for seaboard
Contemporary Examples
Historical Examples
  • Let our seaboard towns become flagrantly wicked—with "railroad speed" the infection will travel far and wide.

  • After this achievement he advanced from the seaboard and encamped in Leuctra on Thespian territory.

    Hellenica Xenophon
  • The result was a great rush of emigrants from the older states on the seaboard to the new settlements in the West.

  • He is the war-lord who sends his battalions of Atlantic rollers to the assault of our seaboard.

    The Mirror of the Sea Joseph Conrad
  • But thereafter immigration from the seaboard States, and from the nearer lands of Kentucky and Tennessee, set in on a new scale.

    The Old Northwest Frederic Austin Ogg
  • It is more American, but less cosmopolitan than the seaboard.

    The Frontier in American History Frederick Jackson Turner
  • The Athenians also set sail from Chios, but stood out to open sea, since the seaboard of Asia was hostile to them.

    Hellenica Xenophon
  • Never before has anything like this been known on our Pacific seaboard.

British Dictionary definitions for seaboard


  1. land bordering on the sea; the seashore
  2. (as modifier): seaboard towns
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for seaboard

"seaward side of a ship," late 15c., from sea + board (n.2).

Online Etymology Dictionary, © 2010 Douglas Harper
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