from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The ester of glycerol and one, two, or three fatty acids.
  • noun Any of various soft, solid, or semisolid organic compounds constituting the esters of glycerol and fatty acids and their associated organic groups.
  • noun A mixture of such compounds occurring widely in organic tissue, especially in the adipose tissue of animals and in the seeds, nuts, and fruits of plants.
  • noun Animal tissue containing such substances.
  • noun A solidified animal or vegetable oil.
  • noun Obesity; corpulence.
  • noun Unnecessary excess.
  • adjective Having much or too much fat or flesh; plump or obese.
  • adjective Full of fat or oil; greasy.
  • adjective Abounding in desirable elements.
  • adjective Fertile or productive; rich.
  • adjective Having an abundance or amplitude; well-stocked.
  • adjective Yielding profit or plenty; lucrative or rewarding.
  • adjective Prosperous; wealthy.
  • adjective Thick; large.
  • adjective Puffed up; swollen.
  • transitive & intransitive verb To make or become fat; fatten.
  • idiom (a fat lot) Very little or none at all.
  • idiom (fat chance) Very little or no chance.
  • idiom (the fat is in the fire) Bad consequences are sure to follow; trouble lies ahead.

from The Century Dictionary.

  • In painting, rich; full of color.
  • noun A local Australian term for fat or marketable cattle.
  • noun A large open vessel for water, wine, or other liquids; a tub; a cistern: now usually vat (which see).
  • noun A dry measure, generally equal to 9 bushels.
  • Having much flesh other than muscle; having an unusual amount of flesh; corpulent; obese: as, a fat man; a fat ox.
  • Containing the substance called fat (see II.); containing or consisting of fat, oil, or grease; oily; greasy; unctuous: as, a fat dish; fat cheese.
  • Hence Containing much resin; resinous: as, fat pine.
  • Containing much plastic or unctuous matter; pinguid: said of clay which is free from intermingled sand, and consequently highly plastic; or of lime made from limestone which contains but a small amount (ten per cent. or less) of the ordinary impurities of limestone — silica, alumina, oxid of iron, etc.
  • Having or showing, in mind or movement, the qualities of a fat animal; heavy; dull; stupid.
  • Well supplied with what is needful or desired; abounding in comforts; prosperous.
  • Abundant in production, or yielding large profits; rich in results or yield; profitable.
  • Nautical, broad, as the quarter of a ship.
  • noun A white or yellowish oily solid substance forming the chief part of the adipose tissue of animals, and also found in plants.
  • noun The best or richest part of a thing.
  • noun In type-setting, work which for any reason is unusually profitable to the compositor. See fat work, above.
  • To make fat; fatten.
  • To become fat; grow fat.
  • In leather-manuf, to smear over with a heavy oil.

from the GNU version of the Collaborative International Dictionary of English.

  • intransitive verb To grow fat, plump, and fleshy.
  • noun obsolete A large tub, cistern, or vessel; a vat.
  • noun obsolete A measure of quantity, differing for different commodities.
  • noun (Physiol. Chem.) An oily liquid or greasy substance making up the main bulk of the adipose tissue of animals, and widely distributed in the seeds of plants. See Adipose tissue, under adipose.
  • noun The best or richest productions; the best part.
  • noun (Typog.) Work. containing much blank, or its equivalent, and, therefore, profitable to the compositor.
  • noun (Chem.) See Sebacic acid, under Sebacic.
  • noun (Chem.) the series of the paraffine hydrocarbons and their derivatives; the marsh gas or methane series.


from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English, from Old English fǣtt, fatted; see peiə- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Middle English, from Old English fæt ("vat, vessel, jar, cup, casket, division"), from Proto-Germanic *fatan (“vessel”), from Proto-Indo-European *pod- (“vessel”). Cognate with Dutch vat ("barrel, vessel"), German Fass ("barrel, drum"), Swedish fat ("barrel, dish, cask"). See vat.



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