Capable of being changed in form, function, or character. The sofa is convertible into a bed, making it perfect for small apartments.
Able to be exchanged for something of equal value, especially in terms of currency or financial instruments. The bonds are convertible into shares of the company at a predetermined rate.
Designed with a roof or top that can be folded or removed to allow open-air use, especially of a motor vehicle. He bought a convertible sports car with a retractable soft-top.