con·vert·i·ble (k?n-vûr?t?-b?l)adj.1. Capable of being converted: a convertible sofa bed.2. Having a top that can be folded back or removed: a convertible automobile.3. Lawfully exchangeable for gold or another currency: dollars convertible into yen.n.1. Something that can be converted.2. A convertible automobile.3. A convertible security.con·vert?i·bil?i·ty n.con·vert?i·bly adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.convertible (k?n?v??t?b?l) adj1. capable of being converted2. (Automotive Engineering) (of a car) having a folding or removable roof3. (Banking & Finance) finance a. a bond or debenture that can be converted to ordinary or preference shares on a fixed date at a fixed priceb. (of a paper currency) exchangeable on demand for precious metal to an equivalent valuec. Canadian (of a mortgage)able to be converted into a longer term mortgage without financial penaltyn (Automotive Engineering) a car with a folding or removable roof con?verti?bility, con?vertibleness n con?vertibly advCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014con?vert?i?ble (k?n?v?r t? b?l) adj. 1. capable of being converted. 2. having a folding top, as an automobile. 3. exchangeable for something of equal value: a convertible currency. 4. having a seat, often with a mattress beneath it, that folds out for use as a bed: a convertible sofa. n. 5. an automobile or boat with a folding top. 6. a convertible sofa. 7. a convertible bond or security. [1350?1400;