One who or that which is at least 100 years old.
Aged 100 years or more; extremely old.
Of or relating to centenarians or a centenary celebration.
A male forefather.
A father of someone's parent.
The archived older version of a file that immediately preceded the father file.
To retain discontinued laws or rules for (a thing, person or organization previously affected by them).
To be, or act as, a grandfather to.