" nonextant "

1: no longer existing;

  * e.g., " ... we know that Renaissance artwork only through copies made by other artists, the original painting being nonextant "

•  Synonyms : 

•  bygone,

•  bypast,

•  dead,

•  defunct,

•  departed,

•  done,

•  expired,

•  extinct,

•  gone,

•  vanished

•  Antonyms : 

•  alive,

•  existent,

•  existing,

•  extant,

•  living