Asseverate \As*sev"er*ate\, v. t. [imp. & p. p. {Asseverated}; p. pr. & vb. n. {Asseverating}.] [L. asseveratus, p. p. of asseverare to assert seriously or earnestly; ad + severus. See {Severe}.] To affirm or aver positively, or with solemnity. Syn: To affirm; aver; protest; declare. See {Affirm}.