noun, noun or participle which takes 'suru'
Refers to a planned event where multiple people end their lives together. This term is rare; the more common synonym is 集団自殺.
See also: 集団自殺
そのカルト教団で集合自殺が起きた。
A group suicide occurred in that cult.
ネットで知り合った人たちが集合自殺を図った。
People who met online attempted a group suicide.