What is the meaning of coast?

noun

• The shore of a sea or ocean.
  • synonyms: seashore, seacoast, sea-coast
• A slope down which sleds may coast.
  • usage: "when it snowed they made a coast on the golf course"
• The area within view.
  • usage: "the coast is clear"
• The act of moving smoothly along a surface while remaining in contact with it.
  • usage: "his slide didn't stop until the bottom of the hill"; "the children lined up for a coast down the snowy slope"
  • synonyms: slide, glide

verb

• Move effortlessly; by force of gravity. .