- on or above the surface of the groundan overground railway
- having become sufficiently established, known, or accepted so as to no longer be considered avante-garde, experimental, or subversive
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
Examples from the Web for overground
But among the factory and office workers is a commuter photographed on the London Overground.Why is This London Commuter in an Obama Ad?
February 5, 2014
Word Origin and History for overground
Online Etymology Dictionary, © 2010 Douglas Harper