Home › Words › O › overexplaineroverexplaineroverexplainer means one who overexplains.Among words judged in Lexicurio's Arena, overexplainer ranks #31,747 of 42,752 for Qualifying.EtymologyFrom overexplain + -er.nounOne who overexplains.Definitions & examples from Wiktionary (CC BY-SA 3.0).