mainline
verb (used without object)
to inject a narcotic, especially heroin, directly into a vein.
mainlines
-
present tense formof mainline (3rd person singular).present tense
Used to describe things happening now or regularly.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Trunk lines appear to be in better condition than the utility’s mainlines.
From Los Angeles Times ● Jul. 25, 2026
"There is still no commitment to electrifying the north Wales or south Wales mainlines, something businesses consistently tell us is essential to unlocking real economic growth across the whole country."
From BBC ● Feb. 17, 2026
He mainlines all of his romantic entanglements as if they were the antidote to his unresolved traumas.
From Salon ● Apr. 25, 2025
Current labor agreements ensure that freight trains on mainlines have two people — an engineer and conductor — onboard.
From Washington Post ● Mar. 3, 2023
Investigators said testing found that the gas lines between the home’s meter and the mainlines of the local utility, CenterPoint Energy, were in “proper working order.”
From Seattle Times ● Nov. 2, 2022
