sui generis

being the one or ones of a class with no other members among history's greats Leonardo da Vinci is often considered sui generis—a man of such stupendous genius that the world may never see his like again Synonyms alone, lone, one, one-off, singular, sole, solitary, special, only, uniqueRelated Words single, solo, unaccompanied, unattended; incomparable, inimitable, matchless, peerless, unequaled (or unequalled), unmatched, unparalleled, unrivaled (or unrivalled), unsurpassable, unsurpassed; distinct, distinctive, individual, separate; nonceNear Antonyms divers, manifold, multifarious, myriad; assorted, heterogenous, miscellaneous, mixed, motley, patchwork, promiscuous, varied; popular, prevailing, prevalent, rampant; perennial, recurrent, repeated