名詞 convertible:

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)
   同義詞：convertible security
3. a sofa that can be converted into a bed
   同義詞：sofa bed

形容詞 convertible:

1. capable of being exchanged for or replaced by something of equal value
   同義詞：exchangeable
2. designed to be changed from one use or form to another
3. capable of being changed in substance as if by alchemy
   同義詞：transformable, translatable, transmutable

1. Not convertible into coin.
   不能兌成硬幣的
2. An automobile with a folding top; a convertible coupe.
   篷式汽車(chē)帶有可折疊篷頂?shù)钠?chē); 敞篷小轎車(chē)
3. A convertible sofa bed.
   可變換的沙發(fā)床
4. Dollars convertible into yen.
   可兌換成日元的美金

con.vert.i.ble

adj.（形容詞）
That can be converted:
可以被轉(zhuǎn)變的：
例句：
a convertible sofa bed.
可變換的沙發(fā)床

Having a top that can be folded back or removed:
有車(chē)篷的：有可折疊或拆卸頂篷的：
例句：
a convertible automobile.
敞篷汽車(chē)

Abbr. conv.,cvt.Lawfully exchangeable for gold or another currency:
縮寫(xiě) conv.,cvt.可兌換的：可合法兌換成金子或另一種貨幣的：
例句：
dollars convertible into yen.
可兌換成日元的美金

n.（名詞）
Something that can be converted.
可被改變用途的東西
A convertible automobile.
敞篷汽車(chē)：車(chē)頂可以折卸的汽車(chē)
A convertible security.
可兌換的證券

【引伸】
convert.ibil.ity 或
convert.ibleness
n.（名詞）
convert.ibly
adv.（副詞）