Open English Wordnet
Nouns
(n)pass, passing play, passing game, passing(American football) a play that involves one player throwing the ball to a teammate“the coach sent in a passing play on third and long”
(n)passing, overtakinggoing by something that is moving in order to get in front of it“she drove but well but her reckless passing of every car on the road frightened me”
(n)passing, pass, qualifyingsuccess in satisfying a test or requirement“his future depended on his passing that test”, “he got a pass in introductory chemistry”
Adjectives
(s)ephemeral, passing, short-lived, transient, transitory, fugaciouslasting a very short time“the ephemeral joys of childhood”, “a passing fancy”, “youth's transient beauty”, “love is transitory but it is eternal”, “fugacious blossoms”
(s)casual, cursory, passing, perfunctory, superficialhasty and without attention to detail; not thorough“a casual (or cursory) inspection failed to reveal the house's structural flaws”, “a passing glance”, “perfunctory courtesy”, “In his paper, he showed a very superficial understanding of psychoanalytic theory”
Adverbs
(r)surpassingly, passingto an extraordinary degree“she was a surpassingly beautiful woman”, “I will mention only one particular aspect of the current mess because … this one is surely something new and passing strange” (Walker Percy)