n. A common medical condition most often caused by eating too quickly.
the GNU version of the Collaborative International Dictionary of English
n. 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.
The Century Dictionary and Cyclopedia
n. Want of digestion; incapability of or difficulty in digesting food; dyspepsia.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a disorder of digestive function characterized by discomfort or heartburn or nausea
Word Usage
"He ate slowly and little, for he had what he called indigestion, whatever that was."