capable of being converted.

having a folding top, as an automobile or pleasure boat.

exchangeable for something of equal value

debts payable only in convertible currencies.

an automobile or a boat with a folding top.

a sofa, couch, or chair whose seating section can be folded out into a bed.

Finance . a convertible bond or security.

adjective

able to be changed , adaptable , adjustable , exchangeable , modifiable , swappable , switchable