Di*ges"tion (?; 106), n. [F. digestion, L. digestio.] 1. The act or process of digesting; reduction to order; classification; thoughtful consideration.

2. (Physiol.) The conversion of food, in the stomach and intestines, into soluble and diffusible products, capable of being absorbed by the blood.

3. (Med.) Generation of pus; suppuration.

• The process, in the gastrointestinal tract, by which food is converted into substances that can be utilized by the body.
  
• The result of this process.
  
• The ability to use this process.
  
• The processing of decay in organic matter assisted by microorganisms.
  
• The assimilation and understanding of ideas.