definition of
unquestionable

[1] #1 unquestionable s. [authentic, bona fide, veritable] not counterfeit or copied; "an authentic signature"; "a bona fide manuscript"; "an unquestionable antique"; "photographs taken in a veritable bull ring". wn

[2] #2 unquestionable s. not open to question; "an unquestionable (or unequivocal) loss of prestige". wn