Ancient or antiquated.
Extremely dated.
Pertaining or belonging to the time period prior to a great or destructive flood or deluge.
Pertaining or belonging to the time prior to Noah's Flood.
One who lived prior to Noah's Flood.
Of or relating to centenarians or a centenary celebration.
Aged 100 years or more; extremely old.
One who or that which is at least 100 years old.