English

Definition of mainline verb from the Oxford Advanced Learner's Dictionary

 

mainline

 verb
verb
BrE BrE//ˈmeɪnlaɪn//
 
; NAmE NAmE//ˈmeɪnlaɪn//
 
Verb Forms present simple I / you / we / they mainline
BrE BrE//ˈmeɪnlaɪn//
 
; NAmE NAmE//ˈmeɪnlaɪn//
 
he / she / it mainlines
BrE BrE//ˈmeɪnlaɪnz//
 
; NAmE NAmE//ˈmeɪnlaɪnz//
 
past simple mainlined
BrE BrE//ˈmeɪnlaɪnd//
 
; NAmE NAmE//ˈmeɪnlaɪnd//
 
past participle mainlined
BrE BrE//ˈmeɪnlaɪnd//
 
; NAmE NAmE//ˈmeɪnlaɪnd//
 
-ing form mainlining
BrE BrE//ˈmeɪnlaɪnɪŋ//
 
; NAmE NAmE//ˈmeɪnlaɪnɪŋ//
 
 
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[transitive, intransitive] mainline (something) (slang) to take an illegal drug by injecting it into a vein At 18 he was mainlining heroin.
See the Oxford Advanced American Dictionary entry: mainline

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