CONVERTIBILITY, noun [from convertible.] 1. The quality of being possible to be converted or changed from one substance, form or state to another; as the convertibility of land into money. 2. The quality of being changeable from one letter to another; as the convertibility of m with b or of d into t.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI