Definition of "Sabbath"

Sabbath

/ˈsæbəθ/

noun
plural Sabbaths
1. Friday-Saturday, observed in Judaism and some Christian denominations as a day of rest and worship.
  Quotations
  13 ¶ If thou turne away thy foote from the Sabbath, from doing thy pleasure on my Holy day, and call the Sabbath a delight, the holy of the Lord, honourable, and shalt honour him, not doing thine owne wayes, nor finding thine owne pleasure, nor speaking thine owne wordes:14 Then shalt thou delight thy selfe in the Lord, and I will cause thee to ride vpon the high places of the earth, and feede thee with the heritage of Iacob thy father; for the mouth of the Lord hath spoken it.
  1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Isaiah 58:13–14
2. Sunday, observed in most of Christianity as a day of rest and worship.
3. A meeting of witches. (Also called a witches' Sabbath, Shabbat, sabbat, or black Sabbath.)
  Quotations
  Witches always anointed themselves with ointments before departing up the chimney to their Sabbaths. One such ointment was composed of Aconite, Belladonna, Water Parsley, Cinquefoil and Babies' Fat.
  1936, Rollo Ahmed, The Black Art, London: Long, page 112
  Around this conception was built up the notion of ritual devil-worship, involving the sabbath or nocturnal meeting at which the witches gathered to worship their master and to copulate with him.
  1971, Keith Thomas, Religion and the Decline of Magic, Folio Society, published 2012, page 419
4. (historical) Among the ancient Jews and Hebrews, the seventh year, when the land was left fallow.
5. (Buddhism, Myanmar) uposatha day