convertible in WordNet English dictionary

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

1. capable of being exchanged for or replaced by something of equal value
   "convertible securities"
   convertible  exchangeable 
   
2. designed to be changed from one use or form to another
   "a convertible sofa"; "a convertible coupe"
   convertible 
   
3. capable of being changed in substance as if by alchemy
   "is lead really transmutable into gold?"; "ideas translatable into reality"
   convertible  transformable  translatable  transmutable