Home › Words › S › subbanksubbanksubbank · noun — A secondary or subsidiary bank (in various senses).Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, subbank ranks #42,378 of 43,221 for Qualifying.EtymologyFrom sub- + bank.nounA secondary or subsidiary bank (in various senses).Definitions & examples from Wiktionary (CC BY-SA 3.0).