Определение western hemisphere в Английский Язык Английский Язык словарь
The hemisphere of the Earth to the west of the Greenwich Meridian (zero degree longitude) and east of 180 degrees longitude (approximately the International Date Line)
The half of the earth comprising North America, Central America, and South America. the Western Hemisphere the half of the Earth that includes the Americas and the Caribbean. Part of Earth comprising North and South America and the surrounding waters. Longitudes 20° W and 160° E are often considered its boundaries