A father of someone's parent.
A male forefather.
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.
A model or type of machinery or device which precedes the current (or later) one. Usually used to describe an earlier, outdated model.
One who precedes; one who has preceded another in any state, position, office, etc.; one whom another follows or comes after, in any office or position.
A vertex having a directed path to another vertex