mainline

adj, verb, noun — 19 senses

mainline

adj

/ˈmeɪnˌlaɪn/

Etymology From main + line.

7 senses
  1. 1Normal, principal or standard.
  2. 2Not fundamentalist, charismatic or evangelical.
  3. 3Of or pertaining to the principal route or line of a railway.
  4. 4Of or pertaining to a surface-level heavy rail system as…
  5. 5Of or pertaining to national or long-distance rail…
  6. 6Pertaining to a direct route between two major ports.
  7. 7Of a sequence of opening moves: being part of a main…
1

Normal, principal or standard.

2

Christianity, Protestantism, Lifestyle, Religion US Not fundamentalist, charismatic or evangelical.

  • At a time when mainline denominations are engaged in massive closures of small rural churches, independent charismatics are strategically helping to rechurch rural Canada.2010, Steven M. Studebaker, Pentecostalism and Globalization:
  • This doesn’t necessarily mean Christians are joining mainline congregations — the survey measures self-identification, not church affiliation. It is, nevertheless, a striking turnabout after years when mainline Protestantism was considered moribund and evangelical Christianity full of dynamism.2021 July 9, Michelle Goldberg, “The Christian Right Is in Decline, and It’s Taking America With It”, in The New York Times, →ISSN:
3

Rail transport, Railways, Transport Of or pertaining to the principal route or line of a railway.

4

Rail transport, Railways, Transport Of or pertaining to a surface-level heavy rail system as distinct from an underground, elevated or light rail one.

5

Rail transport, Railways, Transport Of or pertaining to national or long-distance rail network operators as opposed to urban and suburban operators.

  • Merseyrail and mainline services affected by downpour with more heavy rain forecast2019 June 12, Ben Turner, “Liverpool weather forecast: Trains hit by flooding as rain set to batter Merseyside”, in Liverpool Echo:
  • Well-publicised flexible ticketing options are needed for both visitors and workers, integrated across the entire journey: from outside the capital all the way into central London, considering both TfL and mainline rail services.2021, Heart of London Business Alliance, “Written Evidence in "Supporting our high streets after COVID-19"”, in UK Parliament:
6

Economics, Sciences, Shipping, Transport Pertaining to a direct route between two major ports.

7

Board games, Chess, Games Of a sequence of opening moves: being part of a main line ("a standard sequence of opening moves considered to be best play").

  • After 3 e5 the Czech Benoni Defense is created. Unlike the mainline 3 e6, which aims for tactical counterplay in the center, Black aims for solidity there. He will choose later what flank to attack on.2006 May 7, Robert Byrne, “For Most Players, Speed Chess Is Like a Keystone Kops Melee”, in The New York Times, archived from the original on 01 Feb 2023:
  • Short's pragmatic approach to the match was to avoid mainline theory and the teenager's computer preparation.2010 May 21, Leonard Barden, “Nigel Short shows benefit of experience during series with Anish Giri”, in The Guardian:
1 more example
  • The first classical game featured a fairly mainline Nimzo-Indian Defense, with the players following one of So's October 2021 games until move 20.2022 April 4, Luci Kelemen, “Wesley So wins third leg of FIDE Grand Prix 2022 over Nakamura”, in Dot Esports, archived from the original on 30 Dec 2022:

mainline

verb

Etymology From main + line.

1

Slang To inject (a drug) directly into a vein.

  • The patient skinpopped for 1½ years and then started to mainline heroin.1968, Richard Brotman, Alfred M. Freedman, A Community Mental Health Approach to Drug Addiction, page 97:
2

Broadly, Informal To consume voraciously.

  • Last month, she lamented that her busy campaign schedule had kept her from mainlining Amazon’s new “Rings of Power” series.2022 September 21, Jason Horowitz, “Hobbits and the Hard Right: How Fantasy Inspires Italy’s Potential New Leader”, in The New York Times, →ISSN:
3

Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences To integrate (code, etc.) into the main repository for a software project, rather than separate forks.

4

To include (a prisoner) in the general population of a prison.

Derived terms
mainliner, mainlining

mainline

noun

Etymology From main + line.

8 senses
  1. 1An airline's main operating unit, as opposed to…
  2. 2The principal route or line of a railway.
  3. 3In longline fishing the central line to which the branch…
  4. 4The pipeline carrying wastewater to the public drains or…
  5. 5A principal vein into which a drug can be injected.
  6. 6The main repository for a software project, from which…
  7. 7Alternative form of main line.
  8. 8The general population of a prison.
1

Aeronautics, Aerospace, Aviation, Business, Engineering, Natural sciences, Physical sciences An airline's main operating unit, as opposed to codeshares or regional subsidiaries.

2

Rail transport, Railways, Transport The principal route or line of a railway.

3

Fishing, Hobbies, Lifestyle In longline fishing the central line to which the branch lines with baits are attached.

4

Business, Construction, Manufacturing, Plumbing The pipeline carrying wastewater to the public drains or a septic tank.

  • Many plumbers will tell you they don't go off property since that is the local water company's responsibility. Most local water companies would prefer that, if a line is snaked, it is snaked all the way to the mainline connection.2007, Melvin Ladon White, Property Owner's Sewer and Drain Guide, page 31:
  • In addition, opportunities exist for the introduction of these organisms into a system by means of broken or corroded piping, repair of existing mainlines, installation of new mains, back siphonage, and cross-connections, any of which may result in contamination of the water supply.2013, Reviews of Environmental Contamination and Toxicology, page 80:
5

Slang A principal vein into which a drug can be injected.

  • I'm searching for my mainline / I said I couldn't hit it sideways1968, “Sister Ray”, in Lou Reed (lyrics), White Light/White Heat, performed by The Velvet Underground:
6

Computing, Engineering, Mathematics, Natural sciences, Physical sciences, Sciences The main repository for a software project, from which different versions (forks) may be split off.

7

Board games, Chess, Games Alternative Alternative form of main line.

  • 8. ...Qe7! is the mainline and Black unpins with Nc6-d8-e6 […]2005 November 13, Malcolm Pein, “The Sunday chess column”, in The Daily Telegraph, archived from the original on 06 Jul 2016:
8

The general population of a prison.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.

Learn more