mainline
(meɪnlaɪn)
Word forms: 3rd person singular presenttense mainlines, present participle mainlining, past tense, past participle mainlined
1. adjective [ADJECTIVE noun]
A mainline railway is a major railway between two important places.
...the first mainline railway to be built in Britain for almost a hundred years.
...London's mainline stations.
2. adjective [ADJECTIVE noun]
You can use mainline to describe people, ideas, and activities that belong to the most central, conventional, and normal part of a tradition, institution, or business.
We observe a striking shift away from a labor theory among all mainline economists.
3. verb [usually cont]
If people mainline a drug or if they mainline, they inject an illegal drug into themselves.
[informal] We see him snorting and mainlining cocaine. [VERB noun]
[Also VERB]