slot machine - a machine that is operated by the insertion of a coin in a slotcoin box - the part of a slot machine that serves as a receptacle for the coins coin slot - a slot through which coins can be inserted into a slot machine machine - any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks one-armed bandit, slot - a slot machine that is used for gambling; "they spend hours and hours just playing the slots" |