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1. Irrupting or tending to irrupt.
2. Geology Intrusive.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. irrupting or tending to irrupt
2. of, involving, or causing irruption
3. (Geological Science) obsolete (of igneous rocks) intrusive
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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|Adj.||1.||irruptive - of igneous rock that has solidified beneath the earth's surface; granite or diorite or gabbro|
intrusive - of rock material; forced while molten into cracks between layers of other rock
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