the third of the three Jewish divisions of the Old Testament, variously arranged, but usually comprising the Psalms, Proverbs, Job, Song of Solomon, Ruth, Lamentations, Ecclesiastes, Esther, Daniel, Ezra, Nehemiah, and Chronicles.
Slang. a lengthy, detailed explanation or account: Just give me the facts, not the whole megillah. a lengthy and tediously complicated situation or matter.