1

mainline

play
verb main·line \ˈmān-ˌlīn\

Definition of mainline

  1. transitive verb
  2. slang :  to take by or as if by injecting into a principal vein

  3. intransitive verb
  4. slang :  to mainline a narcotic drug

Examples of mainline in a Sentence

  1. His addiction grew worse when he began mainlining.

1938

First Known Use of mainline

1938


2

mainline

adjective main·line

Definition of mainline

  1. :  being part of an established group; also :  being in the mainstream

1941

First Known Use of mainline

1941


MAINLINE Defined for English Language Learners

1

mainline

play
verb main·line \ˈmān-ˌlīn\

Definition of mainline for English Language Learners

  • : to inject (a drug) directly into a vein

2

mainline

adjective main·line

Definition of mainline for English Language Learners

  • : belonging to an established and widely accepted group or system


Medical Dictionary

mainline

play
verb main·line \ˈmān-ˈlīn\

Medical Definition of mainline

mainlined

;

mainlining

  1. transitive verb

  2. slang :  to take by or as if by injecting into a principal vein

  3. intransitive verb

  4. slang :  to mainline a narcotic drug (as heroin)

Learn More about mainline


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