deorbit verb 2noun 1forms 3 verb2 •To cause to leave orbit.The principal improvements in the systems are the ability to return film canisters without deorbiting the spacecraft, and the extension of orbital […] — 1996 •Of an orbiting object, such as a satellite: to leave orbit.The Gemini emergency occurred when Gemini 8 deorbited and landed in the Northern Pacific 1000 miles south of Japan. — 1986 noun1 •The act or process of leaving orbit. formsdeorbited · deorbiting · deorbits