imaginability
/ɪˌmadʒɪnəˈbɪlɪti/ /ɪˌmadʒ(ə)nəˈbɪlɪti/noun
Chiefly Philosophy. The quality of being imaginable.
Origin
Mid 19th century; earliest use found in Samuel Taylor Coleridge (1772–1834), poet, critic, and philosopher. From imaginable + -ity: see -bility.