ASSERT', verb transitive [Latin assero, assertum, to claim or challenge, to maintain or assert; of ad and sero. The sense of sero is to sow, properly to throw or set. To assert is to throw or set firmly.] 1. To affirm positively; to declare with assurance; to aver. 2. To maintain or defend by words or measures; to vindicate a claim or title to; as, to assert our rights and liberties.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI