unhappening in English dictionary unhappening Meanings and definitions of "unhappening" (rare) A happening that fails to occur; a nonevent. Present participle of unhappen. noun (rare) A happening that fails to occur; a nonevent. verb present participle of [i]unhappen[/i] more Grammar and declension of unhappening unhappening ( plural unhappenings) unhappening (plural unhappenings) more Sample sentences with "unhappening" Declension Stem Try again Authors