Noun
(Judaism) a loaf of white bread containing eggs and leavened with yeast; often formed into braided loaves and glazed with eggs before baking
Source: WordNetThe commentators to the Shulhan `Aruch record that it is the custom of some of Diaspora Jewry to be scrupulous in giving Hallah from the dough used for baking "Matzot Mitzvah" (the Shĕmurah Matzo eaten during Passover ) to a Kohen child to eat. Source: Internet