To affirm or aver absolutely or with solemnity
- state categorically
- To affirm or aver definitely, or with solemnity.
1791, from Latin asseveratus, past participle of asseverare "to affirm, insist on, preserve," from ad- "to" (see ad-) + severus "serious, extreme" (see severe). Related: Asseverated; asseverating.
(v. t.) To affirm or aver absolutely, or with solemnity.