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The pectoralis major runs from the collarbone and breastbone to the upper arm and is responsible for bringing the arms forward, drawing them toward the body’s midline and rotating them inward.—Daryl Austin, USA Today, 1 Feb. 2026 Pull your breastbone toward the bar by bending your elbows.—Greg Presto, Outside, 7 Jan. 2026 Wilson is diagnosed with stage II thymoma, a rare form of cancer of the thymus gland, located behind the breastbone.—Jessica Sager, PEOPLE, 16 Nov. 2025 Amy touched her forehead, her breastbone, both shoulders.—Literary Hub, 15 Oct. 2025 See All Example Sentences for breastbone
Word History
First Known Use
before the 12th century, in the meaning defined above
Time Traveler
The first known use of breastbone was
before the 12th century