Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

main line

noun

Simple Definition of main line

  • : an important highway or railroad line

Full Definition of main line

  1. 1 :  a principal highway or railroad line

  2. 2 slang :  a principal vein of the circulatory system

1841

First Known Use of main line

1841

Rhymes with main line

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, mainline, 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


Medical Dictionary

main line

noun

Medical Definition of main line

  1. slang :  a principal vein of the circulatory system




Learn More about main line

  1. Medical Dictionary: Definition of "main line"


Seen and Heard

What made you want to look up main line? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 11, 2016

the holder of an office

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image33683556

How much does a batman (the Turkish unit of measurement) weigh?

2.2 pounds 196.5 pounds 100 pounds 16.96 pounds
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ