1. A specific day in a week that is designated by some religions as being the day during which they worship God: Karin and her family observe the Sabbath on Saturday in accordance with the teachings of her religion.

"The seventh day is the sabbath or the day of rest and worship of the Lord thy God."

Except when directly quoting the Bible, in which Sabbath is spelled with a lower-case "s" (sabbath), it should be spelled with an upper-case "S" (Sabbath) in accordance with universal custom.

The Sabbath falls on Sunday among all christian sects, except the Seventh-Day Adventists when it falls on Saturday as also with Jews, and on Friday among Muslims.

2. Etymology: from Hebrew shabbath, "rest", the seventh day of the week, appointed in the Ten Commandments as a day of rest and worship to be observed by the Jews ("Remember the sabbath day, to keep it holy"), which is now Saturday; therefore, in subsequent Christian usage, the "Lord's Day", as observed by Christians is on Sunday."

"The same Hebrew word has provided us with sabbatical, referring to the seventh year during which ancient Jews were required to refrain from tilling the soil (working on their farms) in order to "rest"; from which we get our modern term sabbatical, a year's vacation awarded to teachers in some educational institutions every seventh year."