pretty much straight out of wikipedia as far as the wording goes ... got to looking it up while pondering terraforming in the Star Trek setting ...
Engineering, Planetary
The application of technology for the purpose of influencing the global properties of a planet.
Geoengineering: It includes only those macroengineering concepts that deal with the alteration of some global parameter, such as the greenhouse effect, atmospheric composition, insulation or impact flux.
Terraforming: a process of planetary engineering, specifically directed at enhancing the capacity of an extra-terrestrial planetary environment to support life as we know it. The ultimate in terraforming would be to create an open planetary biosphere emulating all the functions of the biosphere of the Earth, one that would be fully habitable for human beings.
Astrophysical Engineering: taken to represent proposed activities, relating to future habitation, that are envisaged to occur on a scale greater than that of "conventional" planetary engineering.
Paraterraforming: Also known as the "worldhouse" concept, or domes in smaller versions, paraterraforming involves the construction of a habitable enclosure on a planet which eventually grows to encompass most of the planet's usable area. The enclosure would consist of a transparent roof held one or more kilometers above the surface, pressurized with a breathable atmosphere, and anchored with tension towers and cables at regular intervals.
Opinions and/or critiques ? With any luck the most negative/argumentative one on the boards these days will miss this invite to criticism ...