Upburst definitions

Upburst

• (n.) The act of bursting upwards; a breaking through to the surface; an upbreak or uprush; as, an upburst of molten matter.
Found on http://thinkexist.com/dictionary/meaning/upburst/

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upburst

a burst upward.
Found on https://www.infoplease.com/dictionary/upburst

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