1. To interrupt the quiet, rest, peace, or order of; to unsettle: The loud construction work outside the classroom disturbed the students while they were taking their exam.
2. To interfere with; to interrupt; to hinder: Wendy didn't want anyone to disturb her while she was working on her book.
3. To interfere with the arrangement, order, or harmony of; to disarrange: The new cleaning lady disturbed Mrs. Lawson's organization of the dishes in the kitchen cupboard.
4. To perplex; to trouble: to be disquieted by strange behavior: The thriller on TV disturbed Jenny so much that she couldn't get to sleep that night.
5. To cause a disturbance to someone's sleep, rest, etc.: Tom saw the sign on the door: "Do not disturb".

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.