Deorbit Full definition of deorbit Verb (transitive ) To cause to leave orbit . 1996, DIANE Publishing Company, Intelligence Threat Handbook The principal improvements in the systems are the ability to return film canisters without deorbiting the spacecraft, and the extension of orbital ... 1998, Curtis Peebles, High Frontier: The U.S. Air Force & the Military Space Program - Page 59 First, an orbiting weapon required elaborate spacecraft systems, such as retro-rockets to deorbit it, others to guide it, and still others to arm it. 2007, U.S. Government, Proposed fiscal year 2008 budget request for the Department of the Interior ... - Page 83 ... process will be initiated and over approximately one year the satellites will be maneuvered into an orbit that will eventually safely deorbit them. (intransitive ) Of an orbiting object, such as a satellite, to leave orbit. 1986 , Gloria W. Heath, ed., Space Safety and Rescue, 1984-1985: Proceedings of Symposia , page 62The Gemini emergency occurred when Gemini 8 deorbited and landed in the Northern Pacific 1000 miles south of Japan. 2001 , Rex Hall, David Shayler, The Rocket Men: Vostok & Voskhod, the First Soviet Manned Spaceflights , page 192Vostok 3 deorbited first, at 09.24 MT on 15 August, followed six minutes later by Vostok 4. 2002 , Dan Simmons, "The End of Gravity", in Worlds Enough & Time: Five Tales of Speculative Fiction , page 251Viktor is a friend of mine," she says. "He tells me that he has had strange dreams since Mir deorbited ." © Wiktionary