Discomfort due to a lack of proper digestive action; a failure of the normal changes which food should undergo in the alimentary canal; dyspepsia; incomplete or difficult digestion.
Webster 1828 Edition
Indigestion
INDIGES'TION
,
Noun.
[in and digestion.] Want of due coction in the stomach; a failure of that change in food which prepares it for nutriment; crudity.
As a disease, dyspepsy; that state of the stomach, in which it is incapable of performing its natural healthy functions.