Search
Select the dictionary language
prime meridian
/pɹˈaɪm mɛɹˈɪdiən/
/pɹˈaɪm mɛɹˈɪdiən/
Prime meridian
01
an imaginary line that goes from the North Pole to the South Pole, which helps to measure how far east or west a place is on Earth
Examples
The prime meridian is crucial for global navigation and timekeeping.
Greenwich Mean Time is based on the prime meridian.
