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Anatomy, Zoology. (in bipeds) the outer, front part of the thorax, or the front part of the body from the neck to the abdomen; chest.
Zoology. the corresponding part in quadrupeds.
either of the pair of mammae occurring on the chest in humans and having a discrete areola around the nipple, especially the mammae of the female after puberty, which are enlarged and softened by hormonally influenced mammary-gland development and fat deposition and which secrete milk after the birth of a child: the breasts of males normally remain rudimentary.
the part of a garment that covers the chest.
the bosom conceived of as the center of emotion: What anger lay in his breast when he made that speech?
a projection from a wall, as part of a chimney.
any surface or part resembling or likened to the human breast.
Mining. the face or heading at which the work is going on.
the front of an open-hearth furnace.
the clay surrounding the taphole of a cupola.
a rounded bow.
verb (used with object)
to meet or oppose boldly; confront: As a controversial public figure he has breasted much hostile criticism.
to contend with or advance against: The ship breasted the turbulent seas.
to climb or climb over (a mountain, obstacle, etc.).
to overcome, succeed against.
to come alongside or abreast of.
Verb phrases
breast in, Nautical. to bind (an object, as a boatswain's chair) securely under a projection, as the flare of a bow.
breast off, Nautical.
to thrust (a vessel) sideways from a wharf.
to keep (a vessel) away from a wharf by means of timbers.
beat one's breast, to display one's grief, remorse, etc., in a loud and demonstrative manner.
make a clean breast of, to confess everything (of which one is guilty): You'll feel better if you make a clean breast of it.

before 1000; Middle English brest, Old English brēost; cognate with Old Norse brjōst; akin to German Brust, Gothic brusts, Dutch borst

breastless, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
breast (brɛst)
1.  the front part of the body from the neck to the abdomen; chest
2.  adjective mammary either of the two soft fleshy milk-secreting glands on the chest in sexually mature human females
3.  a similar organ in certain other mammals
4.  anything that resembles a breast in shape or position: the breast of the hill
5.  a source of nourishment: the city took the victims to its breast
6.  the source of human emotions
7.  the part of a garment that covers the breast
8.  a projection from the side of a wall, esp that formed by a chimney
9.  mining the face being worked at the end of a tunnel
10.  beat one's breast to display guilt and remorse publicly or ostentatiously
11.  make a clean breast of to make a confession of
12.  to confront boldly; face: breast the storm
13.  to oppose with the breast or meet at breast level: breasting the waves
14.  to come alongside of: breast the ship
15.  to reach the summit of: breasting the mountain top
[Old English brēost; related to Old Norse brjōst, Old High German brust, Dutch borst, Swedish bräss, Old Irish brū belly, body]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

O.E. breost "breast, bosom; mind, thought, disposition," from P.Gmc. *breustam "breast" (cf. O.S. briost, O.Fris. briast, O.N. brjost, Du. borst, Ger. brust, Goth. brusts), perhaps lit. "swelling" and from PIE base *bhreus- "to swell, sprout" (cf. M.Ir. bruasach "having a broad, strong chest," O.Ir.
bruinne "breast"). The spelling conforms to the Scottish and northern England dialectal pronunciation. Figurative sense of "seat of the emotions" was in O.E.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

breast (brěst)

  1. Either of two milk-secreting, glandular organs on the chest of a woman; mammary gland; mamma.

  2. A corresponding rudimentary gland in the male.

  3. The superior ventral surface of the human body, extending from the neck to the abdomen.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Breasting dolphins shall be positioned adjacent to the parallel body of the vessel when berthed.
The heel breasting angle shall be no less than ninety degrees or more than one hundred thirty-five degrees.
He had not learned the shifting tactics of the newsboys, who although breasting a crowd, dart in and out of its vacant parts.
They come breasting the water with their heads rising upon their powerful necks and shoulders high above the water.
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