lon·gi·tude 
/ˈlɑ:nʤəˌtu:d, Brit ˈlɒnʤəˌtju:d/ noun
plural lon·gi·tudes /ˈlɑ:nʤəˌtu:d, Brit ˈlɒnʤəˌtju:d/ noun 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 [noncount] ▪ a map of the world showing lines of latitude and longitude [count] ▪ calculating the longitudes of different places — compare latitude 1a 2 [count] : an imaginary line that circles the Earth at a particular longitude
▪ The regions are on roughly the same longitude. — compare latitude 1b
▪ The regions are on roughly the same longitude. — compare latitude 1b
