Definitions of disturbance:

• noun:   the act of disturbing something or someone; setting something in motion
• noun:   a disorderly outburst or tumult

  Example: "They were amazed by the furious disturbance they had caused"

• noun:   an unhappy and worried mental state

  Example: "There was too much anger and disturbance"

• noun:   a noisy fight
• noun:   activity that is an intrusion or interruption

  Example: "He looked around for the source of the disturbance"

• noun:   electrical or acoustic activity that can disturb communication
• noun:   (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness