1. (n.) The act of breaking out or bursting forth; as: (a) A violent throwing out of flames, lava, etc., as from a volcano of a fissure in the earth's crust. (b) A sudden and overwhelming hostile movement of armed men from one country to another. Milton. (c) A violent commotion.

2. (n.) That which bursts forth.

3. (n.) A violent exclamation; ejaculation.

4. (n.) The breaking out of pimples, or an efflorescence, as in measles, scarlatina, etc.

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