adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A corset that begins just under the breasts and extends down to the hips.
2. 2
   The circumference of a woman's chest, measured under the breasts.

   "You can measure your underbust and overbust to get an idea of bra size, but it's still just a guideline."

Adjective

1. 1
   Below the bust. not-comparable

Example

More examples

"I wear a P size on my hips and take a larger size underbust."

Etymology

From under- + bust.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.