mainline

verb
main·​line | \ ˈmān-ˌlīn How to pronounce mainline (audio) \
mainlined; mainlining; mainlines

Definition of mainline

 (Entry 1 of 3)

transitive verb

slang : to take by or as if by injecting into a principal vein

intransitive verb

slang : to mainline a narcotic drug

mainline

adjective

Definition of mainline (Entry 2 of 3)

: being part of an established group also : being in the mainstream

main line

noun

Definition of main line (Entry 3 of 3)

1 : a principal highway or railroad line
2 slang : a principal vein of the circulatory system

Examples of mainline in a Sentence

Verb His addiction grew worse when he began mainlining.
Recent Examples on the Web: Verb This pipeline, which runs under the Baltic Sea, gave Germany the option to mainline Russian gas. University Of Houston Energy Fellows, Forbes, 18 Mar. 2022 Given the past 72 hours the Norwegian producer has just careened through, his need to mainline caffeine is understandable. Katie Bain, Billboard, 10 Mar. 2022 The company, at its core, encourages hyper-centralization, ensuring that teens around the world can mimic the same dance or mainline the same 15-second snippet of a song. Elias Leight, Rolling Stone, 15 Dec. 2021 No wonder American diplomats are getting louder in their frustrations with Russia's plan to mainline into Europe with a new pipeline that will make Russia the continent's natural gas pusher. Zachary B. Wolf, CNN, 28 Sep. 2021 Through the mid-20th century, most Protestants in the U.S. belonged to mainline churches, but now they are outnumbered by evangelicals. The Salt Lake Tribune, 14 Sep. 2020 Through the mid-20th century, most Protestants in the U.S. belonged to mainline churches, but now they are outnumbered by evangelicals. The Salt Lake Tribune, 14 Sep. 2020 Through the mid-20th century, most Protestants in the U.S. belonged to mainline churches, but now they are outnumbered by evangelicals. The Salt Lake Tribune, 14 Sep. 2020 Through the mid-20th century, most Protestants in the U.S. belonged to mainline churches, but now they are outnumbered by evangelicals. The Salt Lake Tribune, 14 Sep. 2020 Recent Examples on the Web: Adjective All the clerical sources who spoke to Fox News saw the fracture within the UMC as part of a larger battle over sexuality that has played out in every other mainline Protestant denomination in the United States. Jon Brown, Fox News, 9 June 2022 The Skywalker Saga is a silly and accessible send-up of the nine mainline Star Wars films. Ars Staff, Ars Technica, 4 June 2022 Meanwhile, mainline Protestant churches, and their public influence, are shrinking. Samira Mehta, The Conversation, 24 May 2022 Fifteen years later, he was elected presiding bishop, becoming president and chief executive officer of a mainline Protestant denomination that operates in 17 countries and counts more than 1.7 million members. San Diego Union-Tribune, 6 Feb. 2022 Pay at mainline carriers is much higher than at regional carriers, and on a single flight the amount that flight attendants earn can range significantly. Jennifer Gonnerman, The New Yorker, 23 May 2022 For starters, we’re including the mainline live-action MCU movies and Disney+ TV shows. Christian De Looper, BGR, 20 May 2022 The series has since released 13 mainline games and several spinoffs, and has become one of the highest-grossing video game franchises in the world, selling over 120 million units worldwide. Wilson Chapman, Variety, 12 May 2022 Just over the border in Baileys Crossroads, there’s a push to build senior housing on the excess land adjacent to a mainline Protestant church. Washington Post, 1 May 2022 Recent Examples on the Web: Noun The electric guitar picked up the main line, with supporting harmonies from the saxophone and violin. Christian Hertzog, San Diego Union-Tribune, 1 May 2022 Many magnet fishers wrap duct tape around the excess rope and their main line. Ben Demchak, Popular Mechanics, 3 June 2022 As the storms move into the Lower Mississippi River Valley, very strong winds will enter the region ahead of the main line of storms. Amir Vera, CNN, 30 Mar. 2022 The chances for severe storms will end after the main line of storms moves through, and much more tranquil weather is expected for the rest of the week, with no mentions of severe weather. Leigh Morgan, al, 20 Mar. 2022 Beaches in Los Angeles and Orange counties were shut down after a sewer main line failed, leaking millions of gallons of untreated sewage into the Dominguez Channel, which empties into Los Angeles Harbor. Daniella Genovese, Fox News, 2 Jan. 2022 The spill, which was first detected Thursday afternoon, occurred in the city of Carson because of the failure of a 48-inch sewer main line, the city of Long Beach said in the news release. Alaa Elassar And Joe Sutton, CNN, 2 Jan. 2022 No water main lines will be built under County Line Road, although extensions from the main line into neighborhoods might cross under County Line, Pulvirenti said. Laurinda Joenks, Arkansas Online, 1 Mar. 2022 Designs from Armani's main line traditionally bring down the curtain on Milan's fashion week, which this season hosted mainly in-person catwalk shows rather than digital presentations, including by the likes of Prada, Gucci and Dolce & Gabbana. Reuters, CNN, 28 Feb. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mainline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of mainline

Verb

1938, in the meaning defined at transitive sense

Adjective

1941, in the meaning defined above

Noun

1841, in the meaning defined at sense 1

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Time Traveler for mainline

Time Traveler

The first known use of mainline was in 1841

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Dictionary Entries Near mainline

main line

mainline

mainliner

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Statistics for mainline

Cite this Entry

“Mainline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mainline. Accessed 2 Jul. 2022.

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More Definitions for mainline

mainline

verb
main·​line | \ ˈmān-ˈlīn How to pronounce mainline (audio) \
mainlined; mainlining

Medical Definition of mainline

 (Entry 1 of 2)

transitive verb

slang : to take by or as if by injecting into a principal vein

intransitive verb

slang : to mainline a narcotic drug (as heroin)

main line

noun

Medical Definition of main line (Entry 2 of 2)

slang
: a principal vein of the circulatory system

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