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a. Land next to the sea; the seashore.
b. The water near this land: fish of the Atlantic coast.
c. Coast The Pacific coast of the United States.
2. A hill or other slope down which one may coast, as on a sled.
3. The act of sliding or coasting; slide.
4. Obsolete The frontier or border of a country.
v. coast·ed, coast·ing, coasts
a. To slide down an incline through the effect of gravity.
b. To move without use of propelling power. See Synonyms at slide.
2. To act or move aimlessly or with little effort: coasted for a few weeks before applying for a job.
3. Nautical To sail near or along a coast. Nautical
To sail or move along the coast or border of.

[Middle English coste, from Old French, from Latin costa, side; see kost- in Indo-European roots.]

coast′al (kō′stəl) adj.
References in classic literature ?
But it was too late, there was no room for it, and coasting onto the floor, it disappeared in a most mysterious manner.
that his master, as he hears, is coasting Spain; and this done, is away to gratify his seafaring tastes till he is weary.
Of barges, sailing colliers, and coasting traders, there were perhaps as many as now; but, of steam-ships, great and small, not a tithe or a twentieth part so many.