kəʊst
koʊstIdioms
the coast is clear
(informal) there is no danger of being seen or caughtAs soon as the coast was clear he climbed in through the window.
Usage note: coastbeach seaside coastline sand seashoreThese are all words for the land beside or near to the sea, a river or a lake.coast the land beside or near to the sea or ocean: a town on the south coast of England ◇ The coast road is closed due to bad weather. It is nearly always the coast, except when it is uncountable: That's a pretty stretch of coast.beach an area of sand, or small stones, beside the sea or a lake: She took the kids to the beach for the day. ◇ sandy beachesseaside (especially British English) an area that is by the sea, especially one where people go for a day or a holiday: a trip to the seaside It is always the seaside, except when it is used before a noun: a seaside resort. The seaside is British English; in American English seaside is only used before a noun.coastline the land along a coast, especially when you are thinking of its shape or appearance: California's rugged coastlinesand a large area of sand on a beach: We went for a walk along the sand. ◇ a resort with miles of golden sandsthe seashore the land along the edge of the sea or ocean, usually where there is sand and rocks: He liked to look for shells on the seashore.beach or seashore?Beach is usually used to talk about a sandy area next to the sea where people lie in the sun or play, for example when they are on holiday/vacation. Seashore is used more to talk about the area by the sea in terms of things such as waves, sea shells, rocks, etc, especially where people walk for pleasure.along the coast/beach/coastline/seashoreon the coast/beach/coastline/sands/seashoreat the coast/beach/seaside/seashoreby the coast/seaside/seashorea(n) rocky/unspoiled coast/beach/coastlineto go to the coast/beach/seaside/seashore