1. Pertaining to the symptoms of a mental illness; demented: Mary's aunt is disturbed and unbalanced because she is affected with an emotional disorder and must take medicine prescribed by her doctor.
2. Concerning the state of being shocked or very alarmed; distressed: Jane was very disturbed when she heard of the plane crash and thought her parents might have been on it.
3. Referring to the disarrangement of items in a place: When Susan went into her bedroom, she noticed the disturbed pens and notebooks on her desk because they weren't where she usually put them.