eruption

[ ih-ruhp-shuh n ]
/ ɪˈrʌp ʃən /

noun

an issuing forth suddenly and violently; outburst; outbreak.
Geology. the ejection of molten rock, steam, etc., as from a volcano or geyser.
something that is erupted or ejected, as molten rock, volcanic ash, or steam.
Pathology.
  1. the breaking out of a rash or the like.
  2. a rash or exanthem.

Origin of eruption

1375–1425; late Middle English < Latin ēruptiōn- (stem of ēruptiō). See erupt, -ion

Related forms

e·rup·tion·al, adjectivenon·e·rup·tion, nounpre·e·rup·tion, nounre·e·rup·tion, noun

Can be confused

eruption irruption
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for eruption

Medicine definitions for eruption

eruption

[ ĭ-rŭpshən ]

n.

An appearance of a rash or blemish on the skin.
Such a rash or blemish.
The emergence of a tooth through the gums.

Related forms

e•ruptive (-tĭv) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for eruption

eruption

[ ĭ-rŭpshən ]

The release of gas, ash, molten materials, or hot water into the atmosphere or onto the Earth's surface from a volcano or other opening in the Earth's surface.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.