illness illium • illocal · · · Info · Definitions · Synonyms · Antonyms · Characters · · illness · · Text Latin · · Script 7 · · Length Definitions · · · (noun) impairment of normal physiological function affecting part or all of an organism. Synonyms: unwellness, malady, sickness. · · Noun Definition 1 Synonyms · · · unwellness · · Synonym 1 malady · · Synonym 2 sickness · · Synonym 3 Antonyms · · · health · · Antonym 0 wellness · · Antonym 1 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E s latin small letter s U+0073