affirmātĭo (adf-), ōnis, f. [affirmo],
an affirmation , declaration , confirmation , or averment of a fact or assertion : est enim jus jurandum adfirmatio religiosa, Cic. Off. 3, 29; so Planc. ap. Cic. Fam. 10, 21, and Cic. ib. 7: in spem venire alicujus adfirmatione de aliqua re, Caes. B. G. 7, 30: constantissima annalium adfirmatione, Plin. 28, 2, 4, § 15; multā abfirmatione abnuere, Curt. 6, 11.