noun, plural fe·lo·nes-de-se [fel-uh-neez-di-see, -sey, fuh-loh-neez-] /ˈfɛl əˌniz dɪˈsi, -ˈseɪ, fəˈloʊ niz-/, fe·los-de-se [fel-ohz-di-see, -sey] /ˈfɛl oʊz dɪˈsi, -ˈseɪ/.
- a person who commits suicide or commits an unlawful malicious act resulting in his or her own death.
- the act of suicide.
Latin, “suicide,” literally “one guilty concerning himself.”