Verb

• 1. enter uninvited;

  "They intruded on our dinner party"

  "She irrupted into our sitting room"

• 2. erupt or intensify suddenly;

  "Unrest erupted in the country"

  "Tempers flared at the meeting"

  "The crowd irrupted into a burst of patriotism"

• 3. increase rapidly and in an uncontrolled manner;

  "The population of India is exploding"

  "The island's rodent population irrupted"