A delusion is a belief held with strong conviction despite superior evidence to the contrary.

Delusion(s) or Delusional may also refer to:

Films Delusion (1955 film), a Danish crime film drama directed by Johan Jacobsen Delusion (1981 film), an American horror film directed by Alan Beattie Delusion (1991 film), an American crime thriller film directed by Carl Colpaert Delusion (1998 film), a Croatian crime-drama film directed by Zeljko Senecic Delusions (film), a 2005 Israeli comedy-drama film directed by Nimrod Etsion Koren Delusional (film), an American thriller film starring Perry King and Tuesday Knight Delusion (2016 film), a Chinese-Hong Kong suspense thriller film directed by Danny Pang Phat

Music Delusions (To-Mera album), 2006 Delusions (First Choice album), 1977 "Delusional" (Kesha song), 2024 "Delusional" (Remember Monday song), 2026 "Delusional", a 2010 song by Simon Curtis "Delusional", a 2023 song by Chris Brown from 11:11 "Delusional", a 2024 song by Georgia Webster "Delusional", a 2024 song by Ken Carson

Other uses Delusion (spirituality), in Buddhism or Eastern spirituality, fundamental misunderstanding of the nature of reality Delusion (), treasures of incredible power usually given to Fatui Harbingers in the game Genshin Impact

See also