Added 8 October 2026 southbound /ˈsaʊθbaʊnd/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about southbound at Wordnik → Where our words come from → Moving toward the south. a southbound train Related Words: southwardsouthnorthboundwestboundsouthernnamcemeterynansudlacqueredsouthwestboundsoutheastbound Back to today's word