1.
[syn: northbound, northward]
The Collaborative International Dictionary of English v.0.48:
northbound \northbound\ adj.
1. Moving toward the north; as, northbound traffic.
Syn: northward.
[WordNet 1.5]
2. intended to be used by vehicles moving toward the north;
-- of roads and parts of roads; as, The northbound lane
was blocked by an overturned tractor-trailer.
[PJC]
WordNet (r) 3.0 (2006):
northbound
adj 1: moving toward the north; "the northbound lane"; "we took
the north train"; "the northward flow of traffic" [syn:
northbound, northward]