unreproˈducible,a. (un-1 7, 5 b.) 1880Goldw. Smith Cowper vi. 92 It belongs to an unreproducible past.1893Nation (N.Y.) 18 May 371/1 Desperate efforts to reproduce the unreproducible.1899Kipling Stalky 225 An unreproducible sniff..rounded the retort.[Freq. in recent use.]