The Collaborative International Dictionary of English v.0.48:
Solemnization \Sol`em*ni*za"tion\, n. [Cf. F. solemnisation, solennisation.] The act of solemnizing; celebration; as, the solemnization of a marriage. [1913 Webster]WordNet (r) 3.0 (2006):
solemnization n 1: the public performance of a sacrament or solemn ceremony with all appropriate ritual; "the celebration of marriage" [syn: celebration, solemnization, solemnisation]