1. (n.) The coast of the sea; the land that lies adjacent to the sea or ocean.

2. (n.) All the ground between the ordinary highwater and low-water marks.

aquatic balneal bank beach berm coast coastland coastline deep-sea embankment estuarine foreshore grallatorial ironbound coast lido littoral natant natatorial natatory plage playa riverside riviera rockbound coast sands sea margin seabank seabeach seaboard seacliff seacoast seaside shingle shore shoreline strand submerged coast swimming tidal tidewater water-dwelling water-growing water-living water-loving waterfront waterside