outburst
1. [ noun ] an unrestrained expression of emotion
Synonyms: gush blowup ebullition effusion
Related terms: expression cry explosion flare acting_out blow_up
2. [ noun ] a sudden violent happening
Synonyms: flare-up burst
Examples:

"an outburst of heavy rain" "a burst of lightning"

Related terms: happening salvo rush erupt
3. [ noun ] a sudden violent disturbance
Synonyms: tumultuous_disturbance
Related terms: disturbance
Similar spelling:   outbred
  outbreak
  outbrave