From Longman Dictionary of Contemporary Englishmainlinemain‧line1 /ˈmeɪnlaɪn/ adjective [only before noun] accepted by or involving most people in a society SYN mainstream mainline politics
Examples from the Corpus
mainline• Following the first three axioms helps to mobilize these and bring them to the aid of the mainline medical program.• The extreme mechanistic approach that mainline medicine developed worked well for the great communicable killer diseases.• Unfortunately mainline medicine has been very slow in applying the lesson in other areas.• In the physical realm, the nutrition and the mainline medicine were part of it, but more was needed.• a mainline news network• mainline Protestant churchesmainlinemainline2 verb [intransitive, transitive] informal MDDto inject an illegal drug directly into your blood He was mainlining heroin.→ See Verb tableExamples from the Corpus
mainline• I miss her intellect, her passion, her courage and her penchant for mainlining our nerves. 