saturation in WordNet English dictionary

1. chromatic purity: freedom from dilution with white and hence vivid in hue
   saturation  chroma  intensity  vividness 
   
2. the process of totally saturating something with a substance
   "the impregnation of wood with preservative"; "the saturation of cotton with ether"
   impregnation  saturation 
   
3. the act of soaking thoroughly with a liquid
   saturation 
   
4. a condition in which a quantity no longer responds to some external influence
   saturation