land

Land is the part of the Earth that is not covered with water

Example: The surface of Earth is 70% water, and 30% land.

A land is a country or region

Land is an area of ground that can be used for farming, making buildings, etc.

Example: All this land belongs to me.

When you land, you fall onto the ground.

Example: He jumped off the wall and landed on his feet.

When an airplane lands, it comes down from the air onto the ground.

Example: The plane landed in Chicago.