Real Dictionary

coast
The coast is an area of land that is next to the sea.
verb: If a person or a team is coasting, they are doing something easily, especially winning a competition.
verb: If a vehicle coasts somewhere, it continues to move there with the motor switched off, or without being pushed or pedalled.
verb: If you say that someone is coasting, you are emphasizing that they are not putting enough effort into what they are doing.

coast in American English
land alongside the sea; seashore
to sail along or near the coast of
to sail near or along a coast, esp. from port to port
noun: the land next to the sea; seashore

coast in British English
noun: the line or zone where the land meets the sea or some other large expanse of water