Home › Words › M › middlermiddlermiddler means one of a middle or intermediate class in some schools and seminaries.Among words judged in Lexicurio's Arena, middler ranks #26,786 of 42,749 for Qualifying.EtymologyFrom middle + -er.nounOne of a middle or intermediate class in some schools and seminaries.A pupil at middle school.Someone or something in the middle.Definitions & examples from Wiktionary (CC BY-SA 3.0).