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View synonyms for

mainline

[meyn-lahyn, -lahyn]

verb (used without object)

Slang.
mainlined, mainlining 
  1. to inject a narcotic, especially heroin, directly into a vein.

  2. to use or enjoy something without restriction.

    to mainline on TV movies.



verb (used with object)

Slang.
mainlined, mainlining 
  1. to inject (a narcotic, especially heroin) directly into a vein.

  2. to use, enjoy, or imbibe (something) without restriction.

    mainlining coffee all day long.

adjective

  1. having a principal, established, or widely accepted position; major; mainstream.

    the membership of mainline churches.

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Word History and Origins

Origin of mainline1

1935–40, v., adj. use of main line
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Example Sentences

Examples have not been reviewed.

In north Wales, the Welsh government has been pushing for work on the Wrexham to Liverpool route to enable metro-style services, and upgrades on the north Wales mainline to boost the frequency of services.

From

He used to present as a staid mainline Episcopalian, but now he denounces that church and speaks of being "mauled by demons."

From

Training to become a driver of mainline trains generally takes between one and two years.

From

The UK government has acknowledged that Wales has been underfunded on rail and says it would like to make improvements along the south Wales mainline and in north east Wales, but nothing has been confirmed.

From

He mainlines all of his romantic entanglements as if they were the antidote to his unresolved traumas.

From

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mainland Japanmain line