1. To state or declare something firmly and with confidence, especially in the context of making demands or expressing rights
The workers began to assert claims for better working conditions.
Os trabalhadores começaram a afirmar reivindicações por melhores condições de trabalho.
2. To confidently state that something is true, often in a legal or formal context
The plaintiff will assert claims of negligence against the defendant.
O autor afirmará reivindicações de negligência contra o réu.