Verb
(transitive) To cause to leave orbit.
(intransitive) Of an orbiting object, such as a satellite, to leave orbit.
Source: en.wiktionary.orgPropulsion Propulsion for deorbit was provided by the monopropellant hydrazine (N 2 H 4 ), through a rocket with 12 nozzles arranged in four clusters of three that provided convert thrust, translating to a change in velocity of convert. Source: Internet
Its Service Module (SM) was jettisoned shortly after the deorbit burn and decayed during reentry of the Command Module. Source: Internet