the GNU version of the Collaborative International Dictionary of English
adj. Moving toward the north.
adj. intended to be used by vehicles moving toward the north; -- of roads and parts of roads.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. moving toward the north
Word Usage
"Or, my personal favorite, slipping through a break in northbound traffic and waiting in the "safe space" of the yellow line for southbound traffic to abate."