Open English Wordnet
Nouns
(n)complicationa situation or condition that is complex or confused“her coming was a serious complication”
(n)complicationany disease or disorder that occurs during the course of (or because of) another disease“bed sores are a common complication in cases of paralysis”
(n)complication, ramificationa development that complicates a situation“the court's decision had many unforeseen ramifications”