Webster's English Dictionary

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fat

1. fat \'fat\ aj or fat.ter;  or fat.test [ME, fr. OE f-tt, pp. of 
   f-tan to cram; aki]n to OHG feizit fat, L opimus fat, copious 1: 
   notable for having an unusual amount of fat :  1a: PLUMP  1b: OBESE  of a 
   meat animal  1c: fattened for marked  of food  1d: OILY, GREASY  2a: well 
   filled out : BIG  2b: well stocked : ABUNDANT  3a: richly rewarding or 
   profitable  slang  3b: practically nonexistent {a ~ chance}  3c: SLOTHFUL  
   4: PRODUCTIVE, FERTILE {a ~ year for crops}  of soil  5a: containing 
   minerals that cause a greasy feel  of wood  5b: having a high resin content 
    6: STUPID, FOOLISH  - fat.ness n
2. fat n 1: animal tissue consisting chiefly of cells distended with greasy 
   or oily  matter 2a: oily or greasy matter making up the bulk of adipose 
   tissue and often ab undant in seeds 2b: any of numerous compounds of 
   carbon, hydrogen, and oxygen that are glyc erides of fatty acids, the chief 
   constituents of plant and animal fat, and a major class of energy-rich 
   food, that are soluble in organic solvents (as ether) but not in water, and 
   that are widely used industrially 2c: a solid or semisolid fat as 
   distinguished from an oil  3: the best or richest part  4: the condition of 
   fatness : OBESITY  5: something in excess : SUPERFLUITY 
3. fat  var of PHAT 
4. fat vt or fat.ted;  or fat.ting : to make fat : FATTEN