In the actual sense ‘the beginning’, cf. also inaugurare: ‘employ auguries’, ‘question divinatory birds’; ‘consecrate’.
In Roman religious law, inauguratio is the priestly inauguration into office that has been applied from historically tangible time only for the flamines maiores (Dialis: Gai. Inst. 1,130; 3,114; Liv. 27,8,4; 41,28,7; Martialis: Liv. 29,38,6; 45,15,10; Macrob. Sat. 3,13,11), the rex sacrorum (Labeo at Gell. NA 15,27,1; Liv. 40,42,8) and the augures (Liv. 27,36,5; 30,26,10; 33,44,3; Cic. Brut. 1; Suet. Calig. 12,1), but not fo…