"convertible" in the noun sense
1. convertible
a car that has top that can be folded or removed
2. convertible, convertible security
a corporate security (usually bonds or preferred stock) that can be exchanged for another form of security (usually common stock)
3. convertible, sofa bed
a sofa that can be converted into a bed
"convertible" in the adjective sense
1. convertible, exchangeable
capable of being exchanged for or replaced by something of equal value
"convertible securities"
2. convertible
designed to be changed from one use or form to another
"a convertible sofa"
"a convertible coupe"
3. convertible, transformable, translatable, transmutable
capable of being changed in substance as if by alchemy
"is lead really transmutable into gold?"
"ideas translatable into reality"
Source: WordNet® (An amazing lexical database of English)
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