Sabbath /ˈsæbəθ/noun 6forms 2phrases 1 noun6 •Friday, observed in Islam as a day of rest and worship. •Saturday, observed in Judaism as a day of rest and worship. •Sunday, observed in Christianity as a day of rest and worship.Jerusalem is a city of three Sabbaths–Friday (Muslim), Saturday (Jewish), and Sunday (Christian). •Synonym of uposatha, a regular day of fasting, devotion, or other religious observance. •A meeting of witches. (Also called a witches' Sabbath, Shabbat, sabbat, or black Sabbath.)They travel through the air in various strange conveyances, and it is no easy matter to distinguish between their convention and a Sabbath of the Witches. — 1828 •(historical) Among the ancient Jews and Hebrews, the seventh year, when the land was left fallow. formsSabbaths · sabbaths Phrases with Sabbath break the SabbathTo violate (the holiness or sanctity of) the Sabbath (by not keeping it holy).