Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Earth sciences, Geographygeo-ge‧o- /dʒiːəʊ, dʒɪə $ dʒiːoʊ, dʒɪə/ prefix technical HESGrelating to the Earth or its surface geophysics geopoliticalOrigin geo- Greek ge “earth” ldoceonline.com