Home › Words › S › slumbererslumbererslumberer means one who slumbers; a sleeper.Among words judged in Lexicurio's Arena, slumberer ranks #16,021 of 42,762 for Qualifying.EtymologyFrom Middle English slombere, slomerer, slummerare, equivalent to slumber + -er.nounOne who slumbers; a sleeper.Definitions & examples from Wiktionary (CC BY-SA 3.0).