To insist on the legitimacy of one's rights, opinion, etc; not to allow oneself to be dismissed; to ensure that one is taken into consideration; to make oneself respected; to be assertive.
He would often assert that there was life on other planets.
To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to
To use or exercise and thereby prove the existence of.
To set a signal on a line using a voltage or electric current.
To specify that a condition or expression is true at a certain point in the code.
To declare with assurance or plainly and strongly; to state positively.
an assertion; a section of source code which tests whether an expected condition is true.
To unintentionally not do, neglect.
To lose remembrance of.
To unintentionally leave something behind.
To cease remembering.
Euphemism for fuck, screw (a mild oath).