Source : WordNet®

irrupt
     v 1: enter uninvited; "They intruded on our dinner party"; "She
          irrupted into our sitting room" [syn: {intrude}]
     2: erupt or intensify suddenly; "Unrest erupted in the
        country"; "Tempers flared at the meeting"; "The crowd
        irrupted into a burst of patriotism" [syn: {erupt}, {flare
        up}, {flare}, {break open}, {burst out}]
     3: increase rapidly and in an uncontrolled manner; "The
        population of India is exploding"; "The island's rodent
        population irrupted" [syn: {explode}]