Pronunciation: (pas'ing, pä'sing),[key] —adj. 1. going by or past; elapsing: He was feeling better with each passing day. 2. brief, fleeting, or fortuitous; transitory: to take a passing fancy to something. 3. done, given, etc., in passing; cursory: a passing mention. 4. surpassing, preeminent, or extreme.
5. indicating satisfactory performance in a course, on a paper, in a test, etc.: a passing grade on a test.
—adv. surpassingly; exceedingly; very.
—n. 1. the act of a person or thing that passes or causes something to pass.
2. a means or place of passage.
3. in passing, by the way; incidentally: The speaker mentioned his latest book in passing.