'Indigestion' definitions:

Definition of 'indigestion'

From: WordNet
noun
A disorder of digestive function characterized by discomfort or heartburn or nausea [syn: indigestion, dyspepsia, stomach upset, upset stomach]

Definition of 'Indigestion'

From: GCIDE
  • Indigestion \In`di*ges"tion\ (?; 106), n. [L. indigestio: cf. F. indigestion. See In- not, and Digest.] 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. [1913 Webster]