What is distance?

  • (noun): Indifference by personal withdrawal.
    Example: "Emotional distance"
    Synonyms: aloofness
    See also — Additional definitions below


Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other. In most cases, "distance from A to B" is interchangeable with "distance between B and A".

Read more about Distance.

Some articles on distance:

Field Of View - Machine Vision
... focal length sets up the fixed relationship between the field of view and the working distance ... Working distance is the distance between the back of the lens and the target object ...
Distance - Other "distances"
... E-statistics, or energy statistics, are functions of distances between statistical observations ... Mahalanobis distance is used in statistics ... Hamming distance and Lee distance are used in coding theory ...
Track And Field - Events - Running - Long Distance
... There are three common long distance running events in track and field competitions 3000 metres, 5000 metres and 10,000 metres ... The 3000 m was historically used as a women's long distance event, entering the World Championship programme in 1983 and Olympic programme in 1984, but this was abandoned in favour of a women's 5000 m event in ... In terms of competition rules and physical demands, long distance track races have much in common with middle distance races, except that pacing, stamina, and race tactics become much greater factors in ...
Track And Field - Events - Running - Middle Distance
... Further information Middle distance track event The most common middle distance track events are the 800 metres, 1500 metres and mile run, although the 3000 ... The 880 yard run, or half mile, was the forebear of the 800 m distance and it has its roots in competitions in the United Kingdom in the 1830s ... Physiologically, these middle distance events demand that athletes have good aerobic and anaerobic energy producing systems, and also that they have strong ...
Radar Astronomy
... The strength of the radar return signal is proportional to the inverse fourth-power of the distance ... measure very accurately where an object appears on the sky, but cannot measure the distance accurately at all ... Radar, on the other hand, directly measures the distance to the object (and how fast it is changing) ...

More definitions of "distance":

  • (noun): A remote point in time.
    Example: "If that happens it will be at some distance in the future"; "at a distance of ten years he had forgotten many of the details"
  • (noun): The property created by the space between two objects or points.
  • (verb): Keep at a distance.
    Example: "We have to distance ourselves from these events in order to continue living"
  • (noun): A distant region.
    Example: "I could see it in the distance"
  • (noun): Size of the gap between two places.
    Example: "The distance from New York to Chicago"
    Synonyms: length
  • (noun): The interval between two times.
    Example: "The distance from birth to death"
    Synonyms: space

Famous quotes containing the word distance:

    The rage for road building is beneficent for America, where vast distance is so main a consideration in our domestic politics and trade, inasmuch as the great political promise of the invention is to hold the Union staunch, whose days already seem numbered by the mere inconvenience of transporting representatives, judges and officers across such tedious distances of land and water.
    Ralph Waldo Emerson (1803–1882)

    A petty reason perhaps why novelists more and more try to keep a distance from journalists is that novelists are trying to write the truth and journalists are trying to write fiction.
    Graham Greene (1904–1991)

    As distance shows a horse’s strength, so time reveals a person’s heart.
    Chinese proverb.