ERUPTION

eruption. Eruption, n. a breaking out, burst, pustule, spot

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E‐rup″tion (?), n. [[L. eruptio, fr. erumpere, eruptum, to break out; e out + rumpere, to break: cf. F. éruption. See Rupture.]] 1. 1. 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.
All Paris was quiet . . . to gather fresh strength for the next day's eruption. W. Irving. 2. 2. That which bursts forth.
3. 3. A violent exclamation; ejaculation.
He would . . . break out into bitter and passionate eruditions. Sir H. Wotton. 4. 4. (Med.) The breaking out of pimples, or an efflorescence, as in measles, scarlatina, etc.