geoengineering Syllabification: (ge·o·en·gi·neer·ing)Pronunciation: /ˌjēōenjəˈni(ə)riNG/Translate geoengineering | into French | into Italian Definition of geoengineering noun the deliberate large-scale manipulation of an environmental process that affects the earth’s climate, in an attempt to counteract the effects of global warming. geoengineering in other Oxford dictionaries Definition of geoengineering in the British & World English dictionary