Dictionary.com
Thesaurus.com

breastbone

American  
[brest-bohn] / ˈbrɛstˌboʊn /

noun

  1. the sternum.


breastbone British  
/ ˈbrɛstˌbəʊn /

noun

  1. the nontechnical name for sternum

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

breastbone Scientific  
/ brĕstbōn′ /
  1. See sternum


Etymology

Origin of breastbone

before 1000; Middle English brust-bon, Old English brēostbān. See breast, bone ( def. )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Then the dusty elephant with those arched and dome-like toenails that is standing on my breastbone is lighter.

From The Wall Street Journal Apr. 21, 2026

Through scans, the doctors found out that the parasitic twin was attached to the teen's breastbone and was being supplied blood from a vessel in his chest.

From BBC Feb. 26, 2025

It was hard to cut through the backbone and impossible to crack the breastbone down.

From Seattle Times Nov. 16, 2023

One evening, mid-dream, Merrell threw himself into a corner of a nightstand, breaking his skin but narrowly missing his breastbone.

From Scientific American Jan. 24, 2023

Shakily, he daubed circles on his heels, breastbone and forehead, As he finished the one on his forehead, he shut his eyes.

From "Wolf Brother" by Michelle Paver

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training