An assertion; a section of source code which tests whether an expected condition is true.
To declare with assurance or plainly and strongly; to state positively.
To use or exercise and thereby prove the existence of.
To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to
To specify that a condition or expression is true at a certain point in the code.
To set a signal on a line using a voltage or electric current.