English Dictionary

grandfather

/ˈɡɹæn(d)ˌfɑːðə(r)/

noun

A father of someone's parent. / (by extension) A male forefather. / (computing) The archived older version of a file that immediately preceded the father file.

My grandfather taught me how to fish.

意味（1）

A father of someone's parent.

Grandfather, Father, and Son. The Father diſſeiſeth the Grandfather and dies, the Son endows the Mother, the Grandfather dies, the Son may enter upon the Mother; for he hath a new Right deſcended to him from the Grandfather, for the Grandfather might have entred upon the Mother, ſo ſhall his Heir.

意味（2）

(by extension) A male forefather.

Brethren: Here is the pipe which your grandfathers used to smoke with when they met together in councils of peace. And here is some of that good tobacco, prepared for our grandfathers from God:—When you shall taste of it, you shall feel it through all your body; and it will put you in remembrance of the good councils your grandfathers used to hold with the English, your brethren, and that ancient friendship they had together.

意味（3）

(computing) The archived older version of a file that immediately preceded the father file.

File C is the grandfather because it was used to create file B.