Sea Definition

Explore the definition of sea, its characteristics, examples, and importance. Learn about famous seas like the Mediterranean Sea and the Dead Sea.


When we think of the sea, we often conjure up images of vast expanses of water, teeming with life and wonder. But what exactly is the sea, and how is it different from other bodies of water?

What is a Sea?

A sea is a large body of saltwater that is partially enclosed by land. It is smaller than an ocean, but larger than a bay or gulf. Seas are usually connected to an ocean, either directly or through straits or channels.

Characteristics of Seas

  • Seas are saltwater bodies
  • Seas are partially enclosed by land
  • Seas are smaller than oceans
  • Seas are connected to oceans

Examples of Seas

Some well-known seas include the Mediterranean Sea, the Caribbean Sea, and the Red Sea. Each of these seas has its own unique characteristics and ecosystem, making them important for marine life and human activities.

Case Study: The Dead Sea

The Dead Sea, located between Jordan and Israel, is a unique sea known for its high salt content. The salt concentration in the Dead Sea is so high that it allows people to float effortlessly on its surface. This sea is also famous for its healing properties, attracting visitors from around the world.


According to the United Nations, there are over 50 seas around the world, each with its own importance and significance. These seas play a crucial role in regulating the Earth’s climate, supporting marine life, and providing resources for human use.


The sea is a fascinating and vital part of our planet. Understanding what defines a sea and its various characteristics can help us appreciate and protect these essential bodies of water for future generations.

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