Meaning: A period of rest from work.
Genesis 2:2-3
And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made. [3] And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.
Exodus 20:8 Remember the sabbath day, to keep it holy.