Western Hemisphere

Definition

The Western Hemisphere is a geographical term for the half of Earth which lies west of the prime meridian (which crosses Greenwich, London) and east of the Antimeridian. It includes North and South America.

Related terms

North America: A continent entirely within Northern and Western Hemispheres.

South America: A continent located in both Southern and Western Hemispheres.

Prime Meridian: The line of 0° longitude, defined to pass through the Royal Observatory in Greenwich, London; divides Eastern and Western Hemispheres.