Glossary
Travel & Geography
Longitude
Definition
The angular distance of a point east or west of the Prime Meridian (Greenwich, England), measured in degrees from 0 to 180. Combined with latitude, it specifies any location on Earth.
Related Terms
Latitude
The angular distance of a point north or south of the equator, measured in degrees from 0 (equator) to 90 (poles). Combined with longitude, it specifies any location on Earth.
Time Zone
A region of the globe that observes a uniform standard time. The world is divided into 24 primary time zones, each offset from UTC by whole or half hours.
International Date Line
An imaginary line running roughly along the 180th meridian in the Pacific Ocean where the calendar date changes. Traveling westward crosses to the next day; eastward to the previous day.