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1. Engineering that involves large-scale manipulation of the earth's environment, especially as applied to climate change caused by global warming, as in sequestering carbon or increasing the amount of solar radiation reflected from the earth back into space.
2. Engineering applied to geologic structures, as in building tunnels.
ge′o·en′gi·neer′ n. & v.
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.
(Environmental Science) the application of scientific processes to affect the global environment, esp in order to counter the effects of climate change
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014