main line


noun

  1. a principal line or route of a railroad, as contrasted with a branch or secondary one.
  2. a principal highway.
  3. Slang.
    1. a prominent and readily accessible vein of the body that may be used for a narcotic’s injection.
    2. the act of mainlining.

noun

  1. a fashionable residential district west of Philadelphia.
  2. any fashionable district where socially prominent people live.

noun

  1. railways
    1. the trunk route between two points, usually fed by branch lines
    2. (as modifier)a main-line station
  2. US a main road

verb mainline

  1. (intr) slang to inject a drug into a vein

adjective mainline

  1. having an important position, esp having responsibility for the main areas of activity

n.“principal line of a railway,” 1841; meaning “affluent area of residence” is by 1917, originally (with capitals) that of Philadelphia, from the “main line” of the Pennsylvania Railroad which added local stops to a string of backwater towns west of the city late 19c. that helped turn them into fashionable suburbs. The Main Line, Philadelphia’s most famous suburban district, was deliberately conceived in the 1870’s and 1880’s by the [Pennsylvania] Railroad, which built high-toned housing developments, ran hotels, more or less forced its executives to plunk their estates out there, and created a whole series of somewhat spurious Welsh towns along the railroad tracks. … Now everybody assumes these all date from 1682, like the Robertses; but as Chestnut Hill people like to say, “nobody but Welsh peasants lived on the Main Line till the Railroad built it up.” [Nathaniel Burt, “The Perennial Philadelphians,” 1963] The original station stops were, in order out from the city, Overbrook, Merion, Narberth, Wynnewood, Ardmore, Haverford, Bryn Mawr, Paoli. The train line for commuters along it is the Paoli Local.

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