Meaning of the word "delusional disorder" in English

What does "delusional disorder" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

delusional disorder

US /dɪˈluːʒənl dɪsˈɔːrdər/
UK /dɪˈluːʒənl dɪsˈɔːrdər/

Noun

a mental illness in which a person has one or more delusions (false beliefs) that persist for at least one month, without other psychotic symptoms or significant impairment in functioning

Example:
He was diagnosed with delusional disorder after exhibiting persistent false beliefs about being persecuted.
Unlike schizophrenia, delusional disorder typically does not involve other psychotic symptoms like hallucinations or disorganized speech.