Definition of "longitude" []

  • Angular distance on the earth's surface, measured east or west from the prime meridian at Greenwich, England, to the meridian passing through a position, expressed in degrees (or hours), minutes, and seconds. (noun)
  • Celestial longitude. (noun)
  • Distance in degrees east or west of the prime meridian at 0° measured by the angle between the plane of the prime meridian and that of the meridian through the point in question, or by the corresponding time difference (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. (c) HarperCollins Publishers Ltd 2016

Use "longitude" in a sentence
  • "Kerguelen himself only says that it is about 68° of E. longitude, _par_ 68° _de longitude_."
  • "In the days before global positioning satellites, a chronometer - a super-accurate clock - was used to help ascertain longitude on the seas."
  • "This noon she was eight miles east of yesterday's position, yet to-day's position, in longitude, was within"