Entry 1 sense Webster, 1913 Septemvir · Sep·tem·vir · IPA /sɛpˈtɛmvə(ɹ)/ 01 n. One of a board of seven men associated in some office. pl. Septemvirs, Septemviri ((#)) 1. One of a board of seven men associated in some office.(Rom. Hist.)