poker machine noun3 •An electronic machine used to play games of chance for money. •(US) An electronic machine used to play poker.Even better, there are some video poker machines — admittedly, they′re very hard to find — that actually offer favorable odds if you play perfectly. — 2007 •(Australia, New-Zealand) Synonym of slot machine.In New South Wales poker machines were legalized in clubs in 1956. — 1973 formspoker machines