Dictionary
2 ENTRIES FOUND:

1mainline

verb main·line \ˈmān-ˌlīn\

: to inject (a drug) directly into a vein

Full Definition of MAINLINE

transitive verb
slang
:  to take by or as if by injecting into a principal vein
intransitive verb
slang :  to mainline a narcotic drug

Examples of MAINLINE

  1. His addiction grew worse when he began mainlining.

First Known Use of MAINLINE

1938

Rhymes with MAINLINE

A-line, affine, airline, align, alkyne, alpine, assign, at sign, balkline, baseline, beeline, benign, bloodline, blue line, blush wine, bovine, bowline, branchline, breadline, bright-line, buntline, bustline, byline, call sign, canine, caprine, carbine, carmine, cervine, chow line, clothesline, cloud nine, coastline, combine, compline, condign, confine, consign, corvine, cosign, cutline, dateline, deadline, decline, define, design, divine, dragline, driveline, earthshine, Einstein, eiswein, end line, enshrine, entwine, equine, ethyne, fall line, fault line, feline, ferine, first-line, flatline, flight line, foul line, fräulein, frontline, front line, goal line, gold mine, grapevine, guideline, hairline, hard-line, hard pine, headline, hemline, high sign, hipline, Holbein, hotline, ice wine, incline, indign, in fine, in-line, Irvine, jawline, jug wine, landline, land mine, lang syne, lifeline, load line, longline, lupine, main line, malign, midline, moline, moonshine, neckline, off-line, old-line, online, opine, outline, outshine, ovine, Pauline, peace sign, Petrine, pipeline, piscine, pitch pine, plotline, plumb line, plus sign, pontine, porcine, potline, pound sign, propine, punch line, rapine, recline, redline, red pine, refine, reline, repine, resign, Rhine wine, ridgeline, roofline, Sabine, saline, Scotch pine, scrub pine, setline, shoreline, short line, sideline, sight line, skyline, snow line, soft-line, spring line, straight-line, strandline, straw wine, streamline, strip mine, strychnine, subline, sunshine, supine, syncline, taurine, tie-line, times sign, topline, touchline, towline, tramline, trapline, tree line, trephine, trotline, truckline, trunk line, tumpline, turbine, untwine, ursine, vespine, V sign, vulpine, waistline, white line, white pine, white wine, woodbine, yard line, zebrine, Z line

2mainline

adjective

: belonging to an established and widely accepted group or system

Full Definition of MAINLINE

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

First Known Use of MAINLINE

1941

mainline

verb main·line \ˈmān-ˈlīn\   (Medical Dictionary)
main·linedmain·lin·ing

Medical Definition of MAINLINE

transitive verb
slang :  to take by or as if by injecting into a principal vein
intransitive verb
slang :  to mainline a narcotic drug (as heroin)

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