Mainline
verb
To inject a drug into your body with a needle.
The addict was mainlining heroin every day.

Often appears as...
- mainline heroin
- mainline drugs
Usage tips
Informal, Disapproving
Colloquial
adjective
Describes something that is the most important or established.
He is a mainline politician in his country.

Often appears as...
- mainline politician
- mainline railroad
noun
The principal route of a transport system.
The train runs on the mainline from New York to Washington D.C.

Often appears as...
- railroad mainline
- railway mainline
verb
To make something a major concern or priority.
The company plans to mainline its investment in renewable energy.

Often appears as...
- mainline investment
- mainline focus
Usage tips
Formal
Technical
verb
To inject a drug into your body with a needle.
The addict was mainlining heroin every day.

Often appears as...
- mainline heroin
- mainline drugs
Usage tips
Informal, Disapproving
Colloquial
adjective
Describes something that is the most important or established.
He is a mainline politician in his country.

Often appears as...
- mainline politician
- mainline railroad
noun
The principal route of a transport system.
The train runs on the mainline from New York to Washington D.C.

Often appears as...
- railroad mainline
- railway mainline
verb
To make something a major concern or priority.
The company plans to mainline its investment in renewable energy.

Often appears as...
- mainline investment
- mainline focus
Usage tips
Formal
Technical
Definition 1 of 4

Drug Usage
Used to describe someone injecting drugs, usually illicit substances, directly into veins.

Celebrities who mainlined fell into serious health issues.
Colloquial Warning
Considered very informal and offensive in non-drug related discussions.

Never use 'mainline' casually in professional settings.
Drug Usage
Used to describe someone injecting drugs, usually illicit substances, directly into veins.

Celebrities who mainlined fell into serious health issues.
Colloquial Warning
Considered very informal and offensive in non-drug related discussions.

Never use 'mainline' casually in professional settings.
Drug Usage
Used to describe someone injecting drugs, usually illicit substances, directly into veins.

Celebrities who mainlined fell into serious health issues.
Colloquial Warning
Considered very informal and offensive in non-drug related discussions.

Never use 'mainline' casually in professional settings.
Video examples
Insightful human...
It started out in the middle and it exploded with a big bang. And everybody has gravity to one another, gravity based on how much they've been emailing, who they've been emailing with. And it also does sentimental analysis, so if I say "I love you," you're heavier to me. And you attract to my email addresses in the middle, which act like mainline stars.
Video examples
Mind Blown - Hangout to...
eyeball of mankind and with it we are able to mainline the whole of time through the optic nerve I mean think of that idea again that's what you do that's what we do with these brains and that's something that I'm really interested in
Video examples
Insightful human...
It started out in the middle and it exploded with a big bang. And everybody has gravity to one another, gravity based on how much they've been emailing, who they've been emailing with. And it also does sentimental analysis, so if I say "I love you," you're heavier to me. And you attract to my email addresses in the middle, which act like mainline stars.
Video examples
Mind Blown - Hangout to...
eyeball of mankind and with it we are able to mainline the whole of time through the optic nerve I mean think of that idea again that's what you do that's what we do with these brains and that's something that I'm really interested in
Example 1 of 2
Quote examples
Anthea Butler
American Educator
Protestants attacked Catholics during the 1844 Nativist riots in Philadelphia. Guess what that was about? Anti-immigrant sentiment. Back then, it was the influx of Irish Catholics into the city. Now, it's Donald Trump clinging to a bygone notion of Protestant ascendancy and nativist sentiments, when mainline Protestantism is on the wane in the U.S.

Quote examples
Alex Jones
American Activist
When I called Clinton a Wall Street puppet, they called me a right-wing extremist. When I said the same about George W. Bush, they called me an anti-war communist. Now that I'm against Obama for the same reasons, mainline conservatives embrace me. When I attack the next right-wing 'savior,' they're gonna call me a communist again.

Quote examples
Tony Campolo
American Clergyman
There are reasons why Religious Right Evangelicals will continue to dominate religious discourse, not only in their own sector of the Christian community, but also in what transpires in mainline denominations.

Quote examples
Matthew Williamson
British Designer
I wanted to create a bridal collection that is both a natural extension of the mainline eveningwear but, at the same time, reflects the opulence of such an important celebratory event.

Quote examples
Paul Weyrich
American Critic
Both Christians and religious Jews are finding it increasingly difficult to practice their faiths through college groups on so-called mainline campuses in the United States.

Quote examples
Robert H. Schuller
American Clergyman
Twentieth century history of Christianity will name Oral Roberts as the voice that brought the Pentecostal movement to be taken seriously by mainline Christianity.

Quote examples
Bram Cohen
American Scientist
The next release of mainline is going to have a lot of the advanced features people want, by the way.

Quote examples
Herb Alpert
American Musician
I like to listen to classical music... I like mainline jazz.

Quote examples
Anthea Butler
American Educator
Protestants attacked Catholics during the 1844 Nativist riots in Philadelphia. Guess what that was about? Anti-immigrant sentiment. Back then, it was the influx of Irish Catholics into the city. Now, it's Donald Trump clinging to a bygone notion of Protestant ascendancy and nativist sentiments, when mainline Protestantism is on the wane in the U.S.

Quote examples
Alex Jones
American Activist
When I called Clinton a Wall Street puppet, they called me a right-wing extremist. When I said the same about George W. Bush, they called me an anti-war communist. Now that I'm against Obama for the same reasons, mainline conservatives embrace me. When I attack the next right-wing 'savior,' they're gonna call me a communist again.

Quote examples
Tony Campolo
American Clergyman
There are reasons why Religious Right Evangelicals will continue to dominate religious discourse, not only in their own sector of the Christian community, but also in what transpires in mainline denominations.

Quote examples
Matthew Williamson
British Designer
I wanted to create a bridal collection that is both a natural extension of the mainline eveningwear but, at the same time, reflects the opulence of such an important celebratory event.

Quote examples
Paul Weyrich
American Critic
Both Christians and religious Jews are finding it increasingly difficult to practice their faiths through college groups on so-called mainline campuses in the United States.

Quote examples
Robert H. Schuller
American Clergyman
Twentieth century history of Christianity will name Oral Roberts as the voice that brought the Pentecostal movement to be taken seriously by mainline Christianity.

Quote examples
Bram Cohen
American Scientist
The next release of mainline is going to have a lot of the advanced features people want, by the way.

Quote examples
Herb Alpert
American Musician
I like to listen to classical music... I like mainline jazz.

Example 1 of 8
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