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English definition of “assert”

assert

verb [T]    /əˈsɜrt/
to state an opinion or claim a right forcefully : [+ that clause] The companies have asserted that everything they did was appropriate . To assert is also to behave in a way that shows power , authority , or control : Several members of Congress called upon the president to assert leadership . If you assert yourself, you act forcefully in a way that expresses your confidence : You have to learn to speak up and assert yourself at meetings , or you’ll never get anywhere . assertion    /əˈsɜr·ʃən/ noun [C] Critics say the company forces workers to drive recklessly , an assertion the company denies .
(Definition of assert verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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