main line

views updated

main line • n. a chief railroad line: [as adj.] a main-line station. ∎  a principal route, course, or connection: the main line of evolution. ∎  a chief road or street. ∎  inf. a principal vein as a site for a drug injection.• v. (main·line) [tr.] inf. inject (a drug) intravenously: Mariella mainlines cocaine five to seven times a day. DERIVATIVES: main·lin·er n.

More From