n. The partial hydrolysis etc. of food, by enzymes or other materials, prior to normal digestion
the GNU version of the Collaborative International Dictionary of English
n. Digestion too soon performed; hasty digestion.
n. Artificial digestion of food for use in illness or impaired digestion.
The Century Dictionary and Cyclopedia
n. Premature or overhasty digestion.
n. Previous digestion; artificial digestion, as of food by peptonization; digestion before eating.
Word Usage
"It is like that, which the physicians call predigestion, or hasty digestion; which is sure to fill the body full of crudities, and secret seeds of diseases."