General Definition: 1. The action of inserting something small into a space or slot, such as a coin into a pay phone or into a machine in a laundromat, or any action or any thing directly or indirectly associated with this, especially a vending machine. As a Noun: 1. A machine from which you can get things such as cigarettes, chocolate, or coffee by putting in money and pressing a button. English = vending machine. As a Verb or Adjective: 1. To insert a coin into a slot on a vending machine, pay phone, etc.