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Relating to both the east and west coasts of the United States, as:
(adjective)
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Traveling frequently between coasts as part of a business or living arrangement: "the early generation of bicoastal airline commuters” ( Elizabeth Mehren).
(adjective)
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Located or developed chiefly along the two coasts: a bicoastal economy.
(adjective)
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Coast-to-coast: bicoastal telephone calls.
(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.