IPA: /ˈwɛstˌbaʊnd/
KK: /ˈwɛstˌbaʊnd/
Moving or traveling in the direction of the west.
The westbound train will arrive at 5 PM.
Westbound → It is formed from "west" (from Old English *west*, meaning the direction of the setting sun) and "bound" (from Old English *bund*, meaning to be tied or destined). The word "westbound" means destined to go towards the west.
Think of the direction 'west' as where the sun sets, and 'bound' means being tied to a direction — so westbound means heading towards the west.