AskDefine | Define longitude

Dictionary Definition

longitude n : an imaginary great circle on the surface of the earth passing through the north and south poles at right angles to the equator; "all points on the same meridian have the same longitude" [syn: meridian, line of longitude]

User Contributed Dictionary



Middle English: longitude (length, a measured length), from longus "long".


  • (UK) /ˈlɒndʒɪˌtjuːd/, /"lQndZI%tju:d/
  • (US) /ˈlɑːndʒəˌtuːd/, /"lA:ndZ@%tu:d/
  • (Australia) /ˈlɒŋgətʃuːd/, /"lQNg@tSu:d/


  1. Angular distance measured west or east of the Prime Meridian.
  2. Any imaginary line perpendicular to the equator and part of a great circle passing through the North Pole and South Pole.


Derived terms

See also


angular distance
imaginary line through North Pole and South Pole



Middle English: longitude (length, a measured length)


  1. Angular distance measured west or east of the Greenwich Meridian.
  2. An imaginary line perpendicular to the equator, passing through the North Pole and South Pole.


Extensive Definition

Longitude , symbolized by the Greek character lambda (λ), is the east-west (Side to Side) geographic coordinate measurement most commonly used in cartography and global navigation. A line of longitude is a meridian and half of a great circle.


Mariners and explorers for most of history struggled to determine precise longitude. Latitude was calculated by observing with quadrant or astrolabe the inclination of the sun or of charted stars, but longitude presented no such manifest means of study. Amerigo Vespucci was perhaps the first to proffer a solution, after devoting a great deal of time and energy studying the problem during his sojourns in the New World.

External links

longitude in Arabic: خط طول
longitude in Aragonese: Lonchitut
longitude in Asturian: Llonxitú
longitude in Bengali: দ্রাঘিমাংশ
longitude in Min Nan: Keng-tō͘
longitude in Belarusian: Геаграфічная даўгата
longitude in Belarusian (Tarashkevitsa): Даўгата
longitude in Bosnian: Geografska dužina
longitude in Bulgarian: Географска дължина
longitude in Catalan: Longitud (geografia)
longitude in Czech: Zeměpisná délka
longitude in Welsh: Hydred
longitude in Danish: Længdekreds
longitude in German: Geographische Länge
longitude in Modern Greek (1453-): Γεωγραφικό μήκος
longitude in Spanish: Longitud (cartografía)
longitude in Esperanto: Longitudo
longitude in French: Longitude
longitude in Galician: Lonxitude
longitude in Hindi: रेखांश
longitude in Croatian: Zemljopisna dužina
longitude in Igbo: Longitude
longitude in Indonesian: Bujur
longitude in Icelandic: Lengdargráða
longitude in Italian: Longitudine
longitude in Hebrew: קו אורך
longitude in Swahili (macrolanguage): Longitudo
longitude in Kurdish: Hêlîlar
longitude in Lithuanian: Ilguma
longitude in Lingala: Monkɔlɔ́tɔ molaí
longitude in Malayalam: രേഖാംശം
longitude in Dutch: Lengtegraad
longitude in Dutch Low Saxon: Lengtegraod
longitude in Japanese: 経度
longitude in Norwegian: Meridian
longitude in Norwegian Nynorsk: Lengdegrad
longitude in Polish: Długość geograficzna
longitude in Portuguese: Longitude
longitude in Romanian: Longitudine
longitude in Quechua: Suni siwi
longitude in Russian: Долгота
longitude in Slovenian: Zemljepisna dolžina
longitude in Serbian: Географска дужина
longitude in Finnish: Pituuspiiri
longitude in Swedish: Longitud
longitude in Telugu: అక్షాంశం
longitude in Thai: ลองจิจูด
longitude in Turkish: Boylam
longitude in Ukrainian: Довгота
longitude in Vlaams: Lengtegroad
longitude in Chinese: 经度

Synonyms, Antonyms and Related Words

Antarctic Zone, Arctic Circle, Arctic Zone, Cartesian coordinates, Frigid Zones, Lambert conformal projection, Mercator projection, Miller projection, Torrid Zone, Tropic of Cancer, Tropic of Capricorn, Variable Zones, abscissa, aeronautical chart, altitude, aphelion, apogee, astronomical chart, astronomical longitude, atlas, autumnal equinox, azimuth, azimuthal equidistant projection, azimuthal projection, cartographer, cartography, celestial chart, celestial equator, celestial globe, celestial longitude, celestial meridian, chart, chorographer, chorography, circle, climate, climatic chart, clime, colures, conic projection, contour line, contour map, coordinates, cylindrical coordinates, cylindrical projection, declination, distance, ecliptic, equator, equator coordinates, equinoctial, equinoctial circle, equinoctial colure, equinox, extension, extent, galactic longitude, general reference map, geocentric longitude, geodetic longitude, globe, gnomonic projection, graphic scale, great circle, grid line, hachure, heliocentric longitude, heliographic chart, horse latitudes, hydrographic chart, index, infinity, isoline, latitude, layer tint, legend, length, lengthiness, linear measures, long time, longitude in arc, longness, map, map maker, map projection, mapper, measure, meridian, mileage, orbit, ordinate, overall length, parallel, perigee, perihelion, period, perpetuity, photogrammetrist, photogrammetry, photomap, phototopography, physical map, polar coordinates, political map, polyconic projection, prime meridian, projection, reach, relief map, representative fraction, right ascension, road map, roaring forties, scale, sinusoidal projection, small circle, solstitial colure, span, special map, stretch, subtropics, terrain map, terrestrial globe, the line, thematic map, topographer, topographic chart, topography, trajectory, transportation map, tropic, tropics, vernal equinox, weather chart, weather map, yardage, zodiac, zone
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