Definition: In a poker tournament, they may offer an 'add-on,' which is an option to buy more chips than a player received with his original buy-in. Usually, there is one option to 'add-on' during a tournament, at the end of the rebuy period or at the first break.
It is different than a rebuy in that players can choose to 'add-on' regardless of how many chips they have.
It is different than a rebuy in that players can choose to 'add-on' regardless of how many chips they have.