Definition of "Coast" :
noun: the act of moving smoothly along a surface while remaining in contact with it
"The children lined up for a coast down the snowy slope."
noun: the area within view
"The coast is clear."
noun: a slope down which sleds may coast
"When it snowed they made a coast on the golf course."
noun: the shore of a sea or ocean
verb: move effortlessly; by force of gravity