Added 10 October 2026 bustline noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about bustline at Wordnik → Where our words come from → A notional line around a woman's bust. The circumference of this line. Origin From bust + line. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: bustobustbustierbustleunderbustbosomneckline Back to today's word