n. 1. The father of one's mother or father. 2. A forefather; an ancestor. tr.v. grand·fa·thered, grand·fa·ther·ing, grand·fa·thers To exempt (someone or something) from a new regulation that prohibits or restricts something: The new ordinance restricts the size of billboards, but it grandfathers those erected before 1997. [V., from GRANDFATHER CLAUSE.] |
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