Noun
1. an unhappy and worried mental state;
"there was too much anger and disturbance""she didn't realize the upset she caused me"2. (physics) a secondary influence on a system that causes it to deviate slightly
3. activity that is an intrusion or interruption;
"he looked around for the source of the disturbance""there was a disturbance of neural function"4. a disposition that is confused or nervous and upset
5. the act of causing disorder