ETYM Latin convertibilis: cf. French convertible.
1. Capable of being changed in substance as if by alchemy; SYN. transformable, translatable, transmutable.
2. Capable of being exchanged for or replaced by something of equal value; SYN. exchangeable.
3. Designed to be changed from one use or form to another.

1. A car that has top that can be folded or removed.
2. A corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock); SYN. convertible security.
3. A sofa that can be converted into a bed; SYN. sofa bed.