indigestion indigestibly • indigestive · · · Info · Definitions · Synonyms · Characters · · indigestion · · Text Latin · · Script 11 · · Length Definitions · · · (noun) a disorder of digestive function characterized by discomfort or heartburn or nausea. Synonyms: dyspepsia, stomach upset, upset stomach. · · Noun Definition 1 Synonyms · · · dyspepsia · · Synonym 1 stomach upset · · Synonym 2 upset stomach · · Synonym 3 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074