verb (used with object)
to alter the environment of (a celestial body) in order to make capable of supporting terrestrial life forms.
Origin of terraform
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
planetary engineering designed to enhance the capacity of an extraterrestrial planetary environment to sustain life
Word Origin for terraforming
C20: from Latin terra earth + forming
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012