any machine that operates automatically; (in later use esp.) a vending machine.

a machine which is operated by inserting a coin in a slot; also figurative and attributive.

U.S. Now chiefly historical. A machine that automatically dispenses some article or service when a coin or token is inserted; a vending machine.

A penny-in-the-slot machine. rare.

The opening in a slot-machine for the reception of a coin. Also figurative. Also (slang), a slot-machine.

= coin-operated adj.; used as n., esp. of an automatic launderette or dry-cleaning establishment.