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grandfather in

C1 neutral separable transitive

To exempt someone or something from a new rule or requirement because they were part of an existing system before the rule changed.

In plain English

To let someone keep their old rights or situation because they were already in the system before new rules came in.

What does "grandfather in" mean?

One main meaning — here's how to use it.

1 C1 idiomatic neutral

To allow someone or something to continue operating under old rules when new regulations would otherwise apply to them.

"Existing licence holders were grandfathered in and don't need to sit the new examination."

separable
Usage tip

Originally from US law and politics ('grandfather clause'). Now widely used in business, technology, and policy contexts. Common in American English; the concept is understood in British English but the phrasal verb is less frequently used there. Almost always passive: 'they were grandfathered in'.

Words that pair with "grandfather in"

Natural word combinations native speakers use most often.

policy regulation licence contract requirement exemption

How to conjugate "grandfather in"

The five tense forms you'll use most often.

Base
grandfather in
I/you/we/they
3rd person
grandfathers in
he/she/it
Past simple
grandfathered in
yesterday
Past participle
grandfathered in
have + pp
-ing form
grandfathering in
continuous

Hear "grandfather in" in the wild

Listen to native speakers using "grandfather in" in real YouTube videos — click a clip to watch it on Looplines.

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