The fourfold advent of death may be compared to the four ways of extinguishing a lighted oil-lamp.
The flame of the oil-lamp may go out when:
1 the wick burns out,
2 the oil burns out,
3 both the wick and the oil burn out, or
4 the wind blows suddenly or the light is put out purposely even though the wick and the oil still remain.
In the same way, a person may die in one of the following ways:
Death due to the expiration of the age-limit,
Death due to the expiration of the reproductive kammic force,
Death due to the expiration of both the age-limit and kamma,
Death due to the intervention of a destructive kamma. It is sudden death such as the one encountered in car accident or suicide or at a young age sometimes, etc.
May all beings be well and happy & attain the fruits of Nibbana.