1. mentally disturbed or unstable; insane
Usage: often considered offensive when referring to mental illness
2. extremely disturbed or upset in behavior
Usage: informal

Examples

• The deranged man was shouting at strangers on the street.
• She gave him a deranged look when he suggested the ridiculous plan.
• The killer in the movie was portrayed as completely deranged.
• His deranged behavior at the meeting shocked everyone.
• The storm left the garden looking deranged and chaotic.
• Police described the suspect as potentially deranged and dangerous.