Longitude (noun)

1. The angular distance of a place east or west of a reference meridian, typically measured in degrees and denoted by the symbol lambda.
2. The distance of a point from the prime meridian measured eastwards along the equator to 180 degrees.

Origin:

Late 16th century: from latin longitudo, from longus "long". .

Examples:

1. The longitude of the city is 40 degrees east.
2. In navigation, ships and planes use longitude and latitude to determine their position.
3. The longitude of the city is measured in degrees, minutes, and seconds.
4. The Greenwich meridian is the Prime Meridian of longitude.
5. The longitude of the place was not known, so they couldn't locate it on the map.