noun
world
The earth, or a particular realm of life or activity.
Blue oceans and vast continents cover the surface of our world.

Etymology
The Old English word originally combines ideas of human life and age. It broadened from the human realm to the earth and to particular fields of activity.
In context
when we talk about the world we were talking about the people plants and animals that all live here we're also talking about the land and the bodies of water
More examples
- She knows everyone in the world of fashion.
- School is a big part of his world.
- The novel imagines distant worlds where intelligent creatures live.
Forms
world · worlds
worldwide adjective — Extending or occurring throughout the world.