verb (used with object)
to expand or distend, as with air, water, etc.; cause to swell: Overeating bloated their bellies.
to puff up; make vain or conceited: The promotion has bloated his ego to an alarming degree.
to cure (fishes) as bloaters.
verb (used without object)
to become swollen; be puffed out or dilated: The carcass started to bloat.
Also called hoven. Veterinary Pathology. (in cattle, sheep, and horses) a distention of the rumen or paunch or of the large colon by gases of fermentation, caused by eating ravenously of green forage, especially legumes.
a person or thing that is bloated.
bloater ( defs 1, 2 ).

1250–1300; earlier bloat (adj.) soft, puffy, Middle English blout < Old Norse blautr wet, soft

1. swell, inflate, enlarge, balloon. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bloat (bləʊt)
1.  to swell or cause to swell, as with a liquid, air, or wind
2.  to become or cause to be puffed up, as with conceit
3.  (tr) to cure (fish, esp herring) by half-drying in smoke
4.  vet science an abnormal distention of the abdomen in cattle, sheep, etc, caused by accumulation of gas in the stomach
[C17: probably related to Old Norse blautr soaked, Old English blāt pale]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

c.1300, originally an adj., "soft, flabby," but by 17c. meaning "puffed up, swollen." Perhaps from O.N. blautr "soaked, soft from being cooked in liquid," possibly from P.Gmc. *blaut-, from PIE *bhleu- "to swell, well up, overflow," an extension of base *bhel- (2) "to blow, swell" (see
bole). Influenced by or combined with O.E. blawan "blow, puff." The verb sense of "to swell" is first attested 1670s.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

bloat (blōt)
Abdominal distention due to swallowed air or intestinal gas production.

bloat'ed (blō'tĭd) adj.
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 for bloating
If you suspect a dog is bloating, you should not wait to see if he improves.
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