- traveling southward.
- pertaining to southward travel.
Origin of southbound
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for southbound
Southbound Route 95 congestion is expected to increase, so we recommend that drivers consider alternate routes.America's 75 Worst Commutes
The Daily Beast
January 19, 2010
A southbound car was swinging down to them, not a block distant.Joan Thursday
Louis Joseph Vance
Southbound subway trains run fast, especially when the rush of traffic is northward.From Place to Place
Irvin S. Cobb
His alarmed friends were prepared to act promptly when word finally reached them that Older was on the southbound train.'The System,' as uncovered by the San Francisco Graft Prosecution
We shunted once to allow a southbound train to pass, a peculiar train that sent everyone on to the line to see—prisoners of war!The Passionate Friends
Herbert George Wells
Thirty cars of a southbound Illinois Central freight train were blown from the track a mile north of the town.
- going or leading towards the south
Word Origin and History for southbound
Online Etymology Dictionary, © 2010 Douglas Harper