Definition of line of longitude in English:

line of longitude

noun

  • A notional semicircle of constant longitude on the earth's surface, running from one terrestrial pole to the other; a meridian.

    ‘the ship and the storm were both now on the same line of longitude’
    • ‘The official finishing line will be the line of longitude running through the Bishop Rock lighthouse.’
    • ‘The prime meridian is the line of longitude that runs through Greenwich, England.’
    • ‘Altogether there are 180 lines of longitude around the Earth, spaced out approximately every 70 miles around the equator.’
    • ‘Surveys were flown along lines of longitude and were therefore generally oriented perpendicular to the coast.’
    • ‘Prior to the lines of longitude being defined, thousands of sailors were lost at sea as soon as land was out of sight.’