a fashionable residential district west of Philadelphia.
any fashionable district where socially prominent people live.
OTHER WORDS FROM Main LineMain-Line, adjectiveMain-Lin·er, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for most mainline
- the trunk route between two points, usually fed by branch lines
- (as modifier)a main-line station
US a main road
(intr) slang to inject a drug into a vein
having an important position, esp having responsibility for the main areas of activity
Derived forms of main linemainliner, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012