# firm up

idiom

Source: https://englishreference.com/idiom/firm-up
Updated: 2026-08-10

## Meaning

To make (tentative plans) more definite.

## Examples

- Let's firm up our plans for the weekend.
- We have a rough idea for the project, but we need to firm up the details before the meeting.
- The management team met to firm up the new policy, ensuring that every department understood the specific requirements before the official launch next month.

---

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.