# fill in

idiom

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

## Meaning

To inform somebody, especially to supply someone missing or missed information.

## Examples

- Please fill me in on what I missed.
- I was late to the meeting, so my colleague filled me in on the main points.
- After returning from his long sabbatical, the director asked his assistant to fill him in on all the critical developments that had occurred in his absence.

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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.