<p><strong>Adjective</strong></p><ul><li>going by or past; elapsing: He was feeling better with each passing day.</li><li>brief, fleeting, or fortuitous; transitory: to take a passing fancy to something.</li><li>done, given, etc., in passing; cursory: a passing mention.</li><li>surpassing, preeminent, or extreme.</li><li>indicating satisfactory performance in a course, on a paper, in a test, etc.: a passing grade on a test.</li><li>living or being known as a member of a racial, religious, or ethnic group other than one's own, especially living and being known as a white person although of Black ancestry: Employees with a passing racial identity expressed frequent discomfort in the workplace.</li><li>sometimes offensive: being known or perceived as a gender other than the one assigned at birth: Passing women who dress and live as men have existed throughout history. The environment might be safer for a passing trans man than for someone who is obviously transgender.</li></ul><p><strong>Adverb</strong></p><ul><li>surpassingly; exceedingly; very.</li></ul><p><strong>Noun</strong></p><ul><li>the act of a person or thing that passes or causes something to pass.</li><li>a means or place of passage.</li></ul>