What does the term isthmus refer to?

The term isthmus refers specifically to a narrow stretch of land that connects two larger land areas, separating two bodies of water. This geographical feature is significant because it allows for terrestrial movement between two larger regions that are otherwise separated by water. A well-known example of an isthmus is the Isthmus of Panama, which connects North and South America and is crucial for trade and transportation, particularly due to the Panama Canal. Understanding the definition of an isthmus is important in geography and social studies as it relates to discussions about landforms, trade routes, and the movement of people and goods.