Definitions for mainlineˈmeɪnˌlaɪn, -ˈlaɪn
Random House Webster's College Dictionary
main′ line′(n.)
a principal highway or railway line.
Category: Railroads
Slang. an accessible vein that can be used to inject a narcotic.
Category: Status (usage)
Origin of main line:
1835–45
main•lineˈmeɪnˌlaɪn, -ˈlaɪn(v.; adj.)-lined, -lin•ing
(v.i.)Slang.to inject a narcotic directly into a vein.
Category: Status (usage)
(v.t.)Slang. to inject (a narcotic) directly into a vein.
Category: Common Vocabulary, Status (usage)
(adj.)having a principal, established, or widely accepted position.
Category: Common Vocabulary
Origin of mainline:
1935–40, Amer.
main′lin`er(n.)
Princeton's WordNet
mainline(verb)
inject into the vein
"She is mainlining heroin"
Wiktionary
mainline(Verb)
To inject (a drug) directly into a vein.
mainline(Adjective)
normal, principal or standard.
mainline(Adjective)
Of or pertaining to the principal route or line of a railway
mainline(Adjective)
Of or pertaining to a surface railway as distinct from an underground, elevated or light rail one.
Origin: * main + line
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