main line

¹

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.

Main Line

²

noun

1. a fashionable residential district west of Philadelphia.

2. any fashionable district where socially prominent people live.

main line

noun

1. railways

   1. the trunk route between two points, usually fed by branch lines

   2. ( as modifier )

      a main-line station

2. a main road

verb

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

adjective

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

Other Word Forms

• mainliner noun
• Main-Line adjective
• Main-Liner noun

Word History and Origins

Origin of main line¹

First recorded in 1835–45

Related Words

• affluent 
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• comfortable 
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• rich 
• robust 
• wealthy 
• well-heeled 
• well-off 
• well-to-do