broadly, an aircraft carrying explosives that aims to deliberately crash into its target as a suicide mission, especially a Japanese aircraft in World War II that had such an aim, or a pilot flying such an aircraft;
e.g. They recall seeing the kamikaze flying over their city.
(adjective)
relating to or characteristic to a suicidal attack aircraft or its pilot;
e.g. He was sent on a kamikaze mission and didn't expect to return.
(adjective)
reckless, showing an attitude of disregard for one's own welfare or safety, having a potentially self-destructive quality;
e.g. They attempted a kamikaze escape from the prison.