# read in

idiom

Source: https://englishreference.com/idiom/read-in
Updated: 2026-08-10

## Meaning

To allow access to classified information.

## Examples

- The manager will read you in on the new project tomorrow.
- Before the meeting starts, the director needs to read the new team members in on the confidential security protocols.
- Once the security clearance was finalized, the intelligence officer was finally read in on the details of the covert operation.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.