Definitions of longitude

  1. 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"
  2. The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris. The longitude of a place is expressed either in degrees or in time; as, that of New York is 74¡ or 4 h. 56 min. west of Greenwich.
  3. Length; measure or distance along the longest line; - distinguished from breadth or thickness; as, the longitude of a room; rare now, except in a humorous sense.
  4. Distance east and west on the earth's surface measured from a meridian or definite lace, and counted in degrees.
  5. Distance of a place east or west of a given meridian: distance in degrees from the vernal equinox, on the ecliptic.
  6. Distance east or west of a given meridian.
  7. Distance east or west on the earth's surface; length.
  8. Distance of a place east or west from a given meridian; distance from the vernal equinox reckoned eastward on the ecliptic all round the celestial sphere.
  9. The arc or portion of the equator intersected between the meridian of a given place and the meridian of some other place from which longitude is reckoned, as from Greenwich, England, or sometimes from the capital of a country, as from Washington or Paris.
  10. The distance east or west of any place on the earth's surface from a certain fixed point- in Eng. that point is the Royal Observatory, at Greenwich, near London- that of France is in Paris.
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