(ˌʌnɪˈmædʒɪnd) adjnot having been conceived of: a hitherto unimagined scale. Thesaurus
Adj.
1.
unimagined - not imagined even in a dream undreamed, undreamed of, undreamt, undreamt ofincredible, unbelievable - beyond belief or understanding; "at incredible speed"; "the book's plot is simply incredible"