# persona non grata

idiom · CEFR C1 · Formal

Source: https://englishreference.com/idiom/persona-non-grata
Updated: 2026-08-03

## Meaning

Someone who is no longer welcome, and has been told so.

## Examples

- After the argument he was persona non grata at family dinners.
- Two embassy staff were declared persona non grata and given seventy-two hours to leave.
- Nobody sent a letter or made an announcement; he simply stopped being invited, which is how persona non grata usually works outside the diplomatic service.

## Origin

Persona began as a theatrical mask, and Roman law turned it into a term of art for the role a person occupies before the law — the sense that survives in English personal, personnel and personality. Grata means pleasing or acceptable. A persona non grata is a person in an official capacity who is not acceptable. The phrase is diplomatic rather than classical, and it has a precise modern home. Article 9 of the Vienna Convention on Diplomatic Relations of 1961 allows a state to declare any member of a foreign mission persona non grata at any time, with no reason given, after which the sending state must recall them. It is the standard instrument for expelling diplomats, and the wording is deliberately bloodless. English has taken it well outside diplomacy, for anyone who has been quietly or noisily excluded — from an industry, a family gathering, or a bar.

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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.