a Jewish holiday, the Feast of Lots, celebrated on the 14th day of Adar, commemorating the deliverance of the Jews by Esther from a general massacre plotted by Haman: Esth. 9:21
See Purim in American Heritage Dictionary 4
(po͞orˈĭm, po͝o-rēmˈ)
noun Judaism
The 14th of Adar, observed in celebration of the deliverance of the Jews from massacre by Haman.