coast

American  

[kohst] / koʊst /

noun

1. the land next to the sea; seashore.

   the rocky coast of Maine.

   Synonyms:

   littoral, seaside, strand

2. the region adjoining it.

   They live on the coast, a few miles from the sea.

3. a hill or slope down which one may slide on a sled.

4. a slide or ride down a hill or slope, as on a sled.

5. Obsolete. the boundary or border of a country.

6. Informal. the Coast, (in the U.S. and Canada) the region bordering on the Pacific Ocean; the West Coast.

   I'm flying out to the Coast next week.

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verb (used without object)

1. to slide on a sled down a snowy or icy hillside or incline.

2. to descend a hill or the like, as on a bicycle, without using pedals.

3. to continue to move or advance after effort has ceased; keep going on acquired momentum.

   We cut off the car engine and coasted for a while.

4. to advance or proceed with little or no effort, especially owing to one's actual or former assets, as wealth, position, or name, or those of another.

   The actor coasted to stardom on his father's name.

5. to sail along, or call at the various ports of, a coast.

6. Obsolete. to proceed in a roundabout way.

verb (used with object)

1. to cause to move along under acquired momentum.

   to coast a rocket around the sun.

2. to proceed along or near the coast of.

3. Obsolete. to keep alongside of (a person moving).

4. Obsolete. to go by the side or border of.

idioms

1. the coast is clear, no danger or impediment exists; no persons are in the path or vicinity.

   The boys waited until the coast was clear before climbing over the wall.

coast British  

/ kəʊst /

noun

1. 1. the line or zone where the land meets the sea or some other large expanse of water

   2. ( in combination )

      coastland

2. the seaside

3. 1. a slope down which a sledge may slide

   2. the act or an instance of sliding down a slope

4. obsolete borderland or frontier

5. informal the obstacles or dangers are gone

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verb

1. to move or cause to move by momentum or force of gravity

2. (intr) to proceed without great effort

   to coast to victory

3. to sail along (a coast)

Usage

What does coast mean? As a noun, coast most commonly refers to the land next to the sea or ocean, or the region near it. As a verb, coast often means to move along smoothly or without much effort, but it is used differently in different contexts. Coast has many specific definitions, but they are all related to one of these two main meanings. Example: During our bike ride, we coasted down the mountain road, where you can see almost the entire coast of the island.

Related Words

See shore ¹.

Other Word Forms

• coastal adjective
• coastally adverb

Etymology

Origin of coast

First recorded in 1325–75; (noun) Middle English cost(e), < Anglo-French, Middle French, from Latin costa “rib, side, wall”; (verb) Middle English cost(e)yen, costen, from Anglo-French costeier, Old French costoier, derivative of the noun

Explanation

The noun coast describes the area where the land meets the sea — the seashore. When your mom says, "We're going to the coast," pack your bathing suit, because you'll be near the ocean. Coast also has a verb form that describes an effortless movement, like when you're riding your bike down a hill and you don't have to pedal at all. It can also be used figuratively to describe something that's gained without much difficulty. You might coast to victory in the playoffs when your team wins 8-0 and is never threatened.

Example Sentences

An extreme marine heat wave is simmering the Pacific Ocean off the coast of California, and experts are warning that it could affect coastal weather and ecosystems for months.

From Los Angeles Times • Apr. 16, 2026

Stationing ships on Iran’s coast could make U.S. assets susceptible to attack, officials said, so the U.S. will likely try to intercept or quarantine commercial vessels in the Arabian Sea.

From The Wall Street Journal • Apr. 15, 2026

The East-West Pipeline in Saudi Arabia takes oil from fields in the east of the kingdom to the Red Sea port of Yanbu, which is on the kingdom’s west coast.

From MarketWatch • Apr. 15, 2026

It is instead aiming to blockade Iran's Gulf ports by operating its navy in the Gulf of Oman and the Indian Ocean, rather than risk its vessels close to Iran's coast.

From BBC • Apr. 14, 2026

Just off its east coast, deep beneath the seafloor, giant chunks of Earth’s lithosphere and crust are being sucked beneath the country in a process called subduction.

From "Meltdown" by Deirdre Langeland

Related Words

• bank
• beach
• coastline
• seaboard
• shore
• shoreline