Definition of sabbath noun from the Oxford Advanced Learner's Dictionary

 

sabbath

 noun
noun
BrE BrE//ˈsæbəθ//
 
; NAmE NAmE//ˈsæbəθ//
 
(also the Sabbath)[singular] Religious holidays and festivals
 
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(in Judaism and Christianity) the holy day of the week that is used for resting and worshipping God. For Jews this day is Saturday and for Christians it is Sunday. to keep/break the Sabbath (= to obey/not obey the religious rules for this day) It was considered a sin to work or play on the Sabbath. The speaker advocated a less austere observance of the Sabbath. See related entries: Religious holidays and festivals Word Origin Old English, from Latin sabbatum, via Greek from Hebrew šabbāt̲, from šāb̲at̲ ‘to rest’.
See the Oxford Advanced American Dictionary entry: sabbath