The Collaborative International Dictionary of English v.0.48:
Outbound \Out"bound`\, a. Outward bound. --Dryden. [1913 Webster]WordNet (r) 3.0 (2006):
outbound adj 1: that is going out or leaving; "the departing train"; "an outward journey"; "outward-bound ships" [syn: outbound, outward, outward-bound]