delusional
/dɪˈluːʒənəl/
adjective
- Having false beliefs that are not based in reality, often as part of a mental health condition.
- It's hard to argue with someone who is delusional about their own abilities.
- She became delusional after weeks without sleep.
- The patient was delusional and believed he was a famous king.
- Holding an unrealistic or mistaken belief about something, especially in a way that ignores clear evidence.
- She was delusional about her financial situation, spending money she didn't have.
- Some fans are delusional about their team's chances of winning the championship.
- He's delusional if he thinks he can finish that project in one day.
Synonyms