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bustline

[buhst-lahyn]
noun
  1. the outline or shape of a woman's bust.
  2. the part of a garment covering the breasts: a dress with a fitted bustline.
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Origin of bustline

First recorded in 1935–40; bust1 + line1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018