The word delusional or "delulu" is often thrown around in jest. But what does it mean clinically? Here, experts explain.

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The Onion confirmed on Thursday that its parent company acquired Infowars, the disgraced purveyor of Sandy Hook ...

Another delusional belief narcissistic bosses have about themselves is that they never make any mistakes. Their oversized egos lead them to believe that they're completely above failure ...

Video: Mom who plunged to her death with baby in her arms at Petco Park had searched for 'easy suicide' on her phone and had grown paranoid and delusional in the months before the murder-suicide ...

A teenager was "acting on paranoid delusions" when he killed a fellow mental health inpatient, believing the victim was going to "assassinate" him.

The pounding that sailors’ brains take from years of high-speed wave-slamming in the Special Boat Teams can cause symptoms that wreck their careers — and their lives.

A Swindon man has been sentenced to jail after pulling out a knife and attempting to stab his neighbours amid 'delusions'.

The Role of Mental Illness, Delusional Fantasies, and Missed Intervention in the Assassination of John Lennon. The murder of John Lennon by Mark David Chapman ...

‘On 13 November 2015, the housing association notes record that the defendant was displaying extreme signs of paranoia and delusional disorder, continuing for the next 18 months.' Aubrey was ...

Embracing “delusion” might be the key to extraordinary success, according to Mindvalley founder Vishen Lakhiani, who credits his unconventional mindset for building a global personal development ...