I. con‧ver‧ti‧ble¹ AC /kənˈvɜːtəbəl, kənˈvɜːtɪbəl $ -ɜːr-/ adjective

1. an object that is convertible can be folded or arranged in a different way so that it can be used as something else:
a convertible sofa

2. technical able to be exchanged for the money of another country:
a convertible currency

3. technical a financial document such as an insurance arrangement or a bond that is convertible can be exchanged for money, stocks etc
—convertibility /kənˌvɜːtəˈbɪləti, kənˌvɜːtɪˈbɪləti $ -ɜːr-/ noun [uncountable]

[TahlilGaran] Dictionary of Contemporary English ▲

II. convertible² noun [countable]
a car with a soft roof that you can fold back or remove ⇒ hardtop, cabriolet

[TahlilGaran] Dictionary of Contemporary English ▲