the Sabbath (that is Shabbath) or day of weekly repose from secular avocations (also the observance or institution itself); by extension a se'nnight that is the interval between two Sabbaths; likewise the plural in all the above applications

1. the seventh day of each week which was a sacred festival on which the Israelites were required to abstain from all work

a. the institution of the sabbath, the law for keeping holy every seventh day of the week

b. a single sabbath, sabbath day

2. seven days, a week