Home › Words › O › overcallerovercallerovercaller means one who overcalls.EtymologyFrom overcall + -er.nounOne who overcalls.e.g.“The no-trump overcaller completes the transfer, and his partner will bid again when strong.” — 2007 May 19, Phillip Alder, “The Cavendish Wasn’t the Only Game in Town”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).