ˈlɑːnʤəˌtuːd 
British ˈlɒnʤəˌtjuːd
plural longitudes
1
: distance measured in degrees east or west from an imaginary line (called the prime meridian) that goes from the North Pole to the South Pole and that passes through Greenwich, England
a map of the world showing lines of latitude and longitude
calculating the longitudes of different places
2
: an imaginary line that circles the Earth at a particular longitude
The regions are on roughly the same longitude.
Cite this Entry
“Longitude.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/longitude. Accessed 21 Jun. 2026.
Copy Citation
