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

  • adjective Containing or composed of fat.
  • adjective Characteristic of fat; greasy.
  • adjective Derived from or chemically related to fat.
  • noun A fat person.

from The Century Dictionary.

  • Consisting of fat.
  • Containing fat; adipose: as, fatty tissue.
  • Having certain of the properties of fat; especially, having a greasy feel; resembling fat.

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

  • adjective Containing fat, or having the qualities of fat; greasy; gross.
  • adjective (Chem.) any one of the paraffin series of monocarbonic acids, as formic acid, acetic, etc.; -- so called because the higher members, as stearic and palmitic acids, occur in the natural fats, and are themselves fatlike substances.
  • adjective See under Clay.
  • adjective (Med.) a diseased condition, in which the oil globules, naturally present in certain organs, are so multiplied as gradually to destroy and replace the efficient parts of these organs.
  • adjective etc. (Med.), a heart, liver, etc., which have been the subjects of fatty degeneration or infiltration.
  • adjective (Med.) a condition in which there is an excessive accumulation of fat in an organ, without destruction of any essential parts of the latter.
  • adjective (Med.) a tumor consisting of fatty or adipose tissue; lipoma.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Containing, composed of, or consisting of fat.
  • adjective Like fat; greasy.
  • adjective slang Literally or figuratively large.
  • noun pejorative, slang An obese person.

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

  • adjective containing or composed of fat
  • noun a rotund individual


from Wiktionary, Creative Commons Attribution/Share-Alike License

From fat +‎ -y. Cognate with Dutch vettig ("fatty, greasy"), German fettig ("fatty").


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