# turn on its head

idiom

Source: https://englishreference.com/idiom/turn-on-its-head
Updated: 2026-08-10

## Meaning

To turn upside-down; to invert.

## Examples

- The new evidence turned the whole case on its head.
- The sudden discovery of the hidden documents turned our entire project on its head, forcing us to start over.
- The revolutionary scientific findings turned traditional theories on their head, challenging everything experts previously understood about the subject.

---

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.