1sui·cide 
/ˈsu:wəˌsaɪd/ noun
plural sui·cides /ˈsu:wəˌsaɪd/ noun 1 a : the act of killing yourself because you do not want to continue living [noncount] ▪ She had thoughts of suicide. ▪ He committed suicide. [=he killed himself] ▪ He attempted suicide. [=he tried to kill himself] [count] ▪ Authorities have officially ruled the death a suicide. ▪ There were two suicides last year at the university. — see also assisted suicide, physician-assisted suicide
b [count] : a person who commits suicide
▪ Her father was a suicide. [=her father killed himself] 2 [noncount] : an action that ruins or destroys your career, social position, etc.
▪ Accepting that kind of support is political suicide. [=it will cause the end of your career in politics] ▪ It would be suicide for the company to try to expand too quickly. [=the company would fail if it tried to expand too quickly]
b [count] : a person who commits suicide
▪ Her father was a suicide. [=her father killed himself]
▪ Accepting that kind of support is political suicide. [=it will cause the end of your career in politics] ▪ It would be suicide for the company to try to expand too quickly. [=the company would fail if it tried to expand too quickly]
