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coastal

Coastal things are near the ocean. If you like spending time at the beach, you might take a trip to a sunny, coastal vacation spot. Be sure to pack your swimsuit!

You might read phrases like "coastal waters" or "coastal erosion" in an environmental science textbook. The coast is the land that borders an ocean or sea, and the adjective coastal describes things that affect the coast or are located there. Before it meant "edge of the land," coast referred to a body part—specifically, the rib or "flank."

Definitions of coastal
  1. adjective
    of or relating to a coast
    coastal erosion”
  2. adjective
    located on or near or bordering on a coast
    coastal marshes”
    coastal waters”
    “the Atlantic coastal plain”
    Synonyms:
    coastwise
    along or following a coast
    inshore
    close to a shore
    maritime
    bordering on or living or characteristic of those near the sea
    seaward
    directed or situated away from inland regions and toward the sea or coast
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    Antonyms:
    inland
    situated away from an area's coast or border
    interior, midland, upcountry
    of or coming from the middle of a region or country
    landlocked
    surrounded entirely or almost entirely by land
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