The word(s) "disillusion" appears 1 time(s) in 1 verse(s) in Quran in Muhammad Pickthal translation.

(1) The day when He shall gather you unto the Day of Assembling, that will be a day of mutual disillusion. And whoso believeth in Allah and doeth right, He will remit from him his evil deeds and will bring him unto Gardens underneath which rivers flow, therein to abide for ever. That is the supreme triumph.

(سورة التغابن, At-Taghaabun, Chapter #64, Verse #9)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)