See also: regicide French Pronunciation IPA(key): /ʁe.ʒi.sid/ Audio:(file) Noun régicide m (plural régicides) regicide (the killing of a king) Noun régicide m or f by sense (plural régicides) regicide (someone who kills a king) Further reading “régicide”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012. Wikiwand - on Seamless Wikipedia browsing. On steroids.