To cover a black dress while accommodating a larger bust, the best approach involves using specific undergarments, styling accessories, or layering pieces that provide coverage without adding excessive bulk. Strategic Undergarments & Fixes

: A silk or satin camisole in a matching or complementary color can "raise the neckline". For a more seamless look, demi-camisoles or "modesty panels" clip directly to bra straps to cover cleavage.

: A safety pin or a decorative brooch can be used to hold a plunging neckline together. Formal & Casual Layering

: A well-fitted cardigan or a structured blazer can polish a black dress for professional settings.