hamantaschen noun[usually plural]1 •Traditional Ashkenazi three-cornered cookies eaten during the Jewish holiday of Purim. The filling may be made from variously from poppy seeds, prunes, nuts, dates, apricots, fruit preserves, chocolate, caramel, or cheese.A workshop for children and adults on making hamantaschen, the triangular pastries that are traditional for Purim, the Jewish feast being celebrated Saturday and Sunday, will be held tomorrow[…]. — 2007 formshamantasch