This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A sudden, violent display, as of activity or emotion: an outburst of indignation.

v. To burst out.

n. a sudden, violent expression of emotion or activity

n. A bursting forth.

To burst out.

n. A breaking or bursting out; a violent issue or discharge; an outbreak: as, an outburst of wrath.

n. In mining:

n. A sudden outbreak of gas or water in a mine.

n. The outcrop.

n. an unrestrained expression of emotion

n. a sudden violent disturbance

n. a sudden intense happening

"Mr. Wilson, your outburst is a reflection of the lack of civility we see among our political leaders."

disturbance   

outbreak    burst   

outbreak    exclamation    manifestation    surge    gust    frenzy    spasm    shout    impulse    burst