- a prominent and readily accessible vein of the body that may be used for a narcotic's injection.
- the act of mainlining.
Origin of main line
Definition for main line (2 of 2)
Examples from the Web for main line
There are some side-lines, with but two or three trains a day—side-lines that reach the main-line only through other branches.
"It's just as well, I guess," said the main-line superintendent carelessly.The Taming of Red Butte Western|Francis Lynde
Then once more he caught up the severed end of the main-line wire, and touched the opposite side of the instrument.The Young Railroaders|Francis Lovell Coombs
The Natural Bridge is not far from Field, the main-line railway town that serves as a center for this national playground.Your National Parks|Enos A. Mills
Finally, after a vast amount of argument, the main-line divisions were settled, and attention was given to the side-lines.
British Dictionary definitions for main line
- the trunk route between two points, usually fed by branch lines
- (as modifier)a main-line station
Word Origin and History for main line
"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.