Meaning of disturbance

dis•turb•ance

1. the act of disturbing.
2. the state of being disturbed.
3. an instance of this; commotion.
4. something that disturbs.
5. an outbreak of disorder; a breach of public peace: Political disturbances shook the city.
6. any cyclonic storm or low-pressure area, usually a small one.
7. a crustal movement of moderate intensity, somewhat restricted in area.