Definition of "geostationary"

geostationary

adjective
not comparable
1. At a fixed distance in three dimensions relative to a particular point on the Earth's surface; generally only possible with orbital satellites.
  Quotations
  The measurement is accomplished by observing the Faraday rotation angle of signals from geostationary satellites on a continuous basis.
  1971, Thomas A. Croft, Measurement of a Solar Wind Plasma Stream which Endures Several Months But is Intermittent on a Time Scale of about One Day‎