persona non grata - definition of persona non grata by The Free Dictionary
per·so·na non gra·ta (pər-sō′nə nŏn grä′tə, grăt′ə) n. pl. per·so·nae non gra·tae (-nē; -tē) A person who is unacceptable or unwelcome, especially to a foreign government: The leaked memo made the ambassador a persona non grata. The foreign minister decla...