An example of longitude is that New York City is at 74° degrees west and local time is 5 hours less than Greenwich mean time.
- distance east or west on the earth's surface, measured as an arc of the equator (in degrees up to 180° or by the difference in time) between the meridian passing through a particular place and a standard or prime meridian, usually the one passing through Greenwich, England
Origin of longitudeMiddle English ; from Classical Latin longitudo ; from longus, long
- Angular distance on the earth's surface, measured east or west from the Prime Meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds.
- Celestial longitude.
Origin of longitudeMiddle English, length, a measured length, from Old French, from Latin longit&umacron;d&omacron;, longit&umacron;din-, from longus, long; see del-1 in Indo-European roots.