Paraguay and Bolivia are the two countries in South America that are landlocked, meaning they are completely surrounded by land with no access to the sea.
Brazil is shaped like a squashed diamond. On two sides, it is surrounded by south and north Atlantic oceans. On the other two sides, it is surrounded by land consisting of 10 different countries. See the related links for a map.
The landlocked countries of South America are Bolivia and Paraguay.
Liechtenstein and Uzbekistan are examples of double landlocked countries, meaning they are surrounded entirely by other landlocked countries with no coastlines of their own. Liechtenstein is surrounded by Switzerland and Austria, while Uzbekistan is surrounded by Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Afghanistan.
A country that is landlocked is a country that is completely surrounded by land. It has no waterfront to speak of along it's borders. Botswana and Paraguay are two examples of this.
San Marino is surrounded by Italy. Monaco is surrounded by France. Lesotho is surrounded by South Africa.
In South America, the two landlocked countries are Paraguay and Bolivia. Paraguay is bordered by Argentina, Brazil, and Bolivia, while Bolivia is surrounded by Brazil, Paraguay, Argentina, Chile, and Peru. Both countries lack direct access to the ocean, relying on neighboring countries for trade routes.
An isthmus.
Islands are surrounded by water, while "landlocked" areas are completely surrounded by land. Additionally, peninsulas are strips of land that are almost entirely surrounded by water but are still connected to main land.
Liechtenstein is a landlocked country surrounded by other landlocked countries: Switzerland and Austria. Similarly, San Marino is also a landlocked country surrounded by other landlocked countries: Italy.
It is a isthmus.
The South America continent is surrounded by sea, not countries. To the north lies Mexico and the United States of America.