Meaning of Western Hemisphere

West'ern Hem'isphere

Pronunciation: [key]
  1. the western part of the terrestrial globe, including North and South America, their islands, and the surrounding waters.
  2. that half of the earth traversed in passing westward from the prime meridian to 180° longitude.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.