'downbound' definitions:

Definition of 'downbound'

(from WordNet)
adjective
Heading in any direction that is conventionally down; "a downbound channel"; "the downbound train"

Definition of 'downbound'

From: GCIDE
  • downbound \downbound\ adj. leading in a downward direction.
  • Syn: down(prenominal), downward(prenominal). [WordNet 1.5]