A fall or crash (often of an aircraft); a crash accident (e.g., airplane crash).
飛行機の墜落事故で多くの人が負傷した。
Many people were injured in the plane crash.
墜落の原因はまだ調査中だ。
The cause of the crash is still under investigation.
衛星が制御を失って墜落した。
The satellite lost control and fell/crashed.