Main Line
1 Americannoun
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a fashionable residential district west of Philadelphia.
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any fashionable district where socially prominent people live.
noun
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a principal line or route of a railroad, as contrasted with a branch or secondary one.
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a principal highway.
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Slang.
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a prominent and readily accessible vein of the body that may be used for a narcotic's injection.
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the act of mainlining.
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noun
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railways
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the trunk route between two points, usually fed by branch lines
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( as modifier )
a main-line station
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a main road
verb
adjective
Other Word Forms
- Main-Line adjective
- Main-Liner noun
- mainliner noun
Etymology
Origin of main line
First recorded in 1835–45
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He added that the force had "so many main lines of inquiries" and it "wouldn't have been feasible to search the whole of Brantham and the whole of the countryside".
From BBC
Trials have been done using "ropeless creels" which have the main line in a container along with a buoy and these are lowered to the seabed with the creels.
From BBC
The depletion of mangrove forests along the shoreline - the coast’s main line of defence against erosion - is to blame.
From BBC
A message The Associated Press left on the city’s Law Department main line seeking comment Monday wasn’t immediately returned.
From Seattle Times
The extensive corroborating evidence is just one way the prosecution is cutting off the defense’s main line of attack.
From Los Angeles Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.