: the combined area of the earth's upper atmosphere and nearby outer space
The term geospace was coined recently to describe the ensemble of separate regions close to the Earth and traditionally called the atmosphere, ionosphere, magnetosphere, … and solar wind.—M. J. Rycroft et al. The geospace environment is controlled largely by events on the Sun, such as solar flares and coronal mass ejections, which generate significant geomagnetic and upper atmospheric disturbances.—N. A. Gross et al.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!