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

  • n. The ester of glycerol and one, two, or three fatty acids.
  • n. Any of various soft, solid, or semisolid organic compounds constituting the esters of glycerol and fatty acids and their associated organic groups.
  • n. 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.
  • n. Animal tissue containing such substances.
  • n. A solidified animal or vegetable oil.
  • n. Obesity; corpulence.
  • n. The best or richest part: living off the fat of the land.
  • n. Unnecessary excess: "would drain the appropriation's fat without cutting into education's muscle” ( New York Times).
  • adj. Having much or too much fat or flesh; plump or obese.
  • adj. Full of fat or oil; greasy.
  • adj. Abounding in desirable elements.
  • adj. Fertile or productive; rich: "It was a fine, green, fat landscape” ( Robert Louis Stevenson).
  • adj. Having an abundance or amplitude; well-stocked: a fat larder.
  • adj. Yielding profit or plenty; lucrative or rewarding: a fat promotion.
  • adj. Prosperous; wealthy: grew fat on illegal profits.
  • adj. Thick; large: a fat book.
  • adj. Puffed up; swollen: a fat lip.
  • transitive v. To make or become fat; fatten.
  • idiom a fat lot Slang Very little or none at all: a fat lot of good it will do him.
  • idiom fat chance Slang Very little or no chance.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Carrying a larger than normal amount of fat on one's body.
  • adj. Thick.
  • adj. Bountiful.
  • adj. Variant form of phat.
  • n. A specialized animal tissue with a high oil content, used for long-term storage of energy.
  • n. A refined substance chemically resembling the oils in animal fat.
  • n. That part of an organization deemed wasteful.
  • n. An erection.
  • n. A poorly played shot where the ball is struck by the top part of the club head. (see also thin, shank, toe)
  • v. To make fat; to fatten.
  • v. To become fat; to fatten.
  • n. A large tub or vessel for water, wine, or other liquids; a cistern.
  • n. A dry measure, generally equal to nine bushels.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Abounding with fat.
  • adj. Fleshy; characterized by fatness; plump; corpulent; not lean.
  • adj. Oily; greasy; unctuous; rich; -- said of food.
  • adj. Exhibiting the qualities of a fat animal; coarse; heavy; gross; dull; stupid.
  • adj. Fertile; productive
  • adj. Rich; producing a large income; desirable
  • adj. Abounding in riches; affluent; fortunate.
  • adj. Of a character which enables the compositor to make large wages; -- said of matter containing blank, cuts, or many leads, etc.
  • n. A large tub, cistern, or vessel; a vat.
  • n. A measure of quantity, differing for different commodities.
  • n. 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.
  • n. The best or richest productions; the best part.
  • n. Work. containing much blank, or its equivalent, and, therefore, profitable to the compositor.
  • intransitive v. To grow fat, plump, and fleshy.
  • transitive v. To make fat; to fatten; to make plump and fleshy with abundant food.

from The Century Dictionary and Cyclopedia

  • 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.
  • n. A white or yellowish oily solid substance forming the chief part of the adipose tissue of animals, and also found in plants.
  • n. The best or richest part of a thing.
  • n. 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 painting, rich; full of color.
  • n. A local Australian term for fat or marketable cattle.
  • In leather-manuf, to smear over with a heavy oil.
  • n. A large open vessel for water, wine, or other liquids; a tub; a cistern: now usually vat (which see).
  • n. A dry measure, generally equal to 9 bushels.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. lucrative
  • adj. containing or composed of fat
  • n. a soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)
  • adj. having an (over)abundance of flesh
  • v. make fat or plump
  • n. a kind of body tissue containing stored fat that serves as a source of energy; it also cushions and insulates vital organs
  • adj. marked by great fruitfulness
  • adj. having a relatively large diameter
  • n. excess bodily weight


Middle English, from Old English fǣtt, fatted; see peiə- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
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. (Wiktionary)


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