n. 1 (in full sabbath day) a day of rest and religious observance kept by Christians on Sunday, Jews on Saturday, and Muslims on Friday. 2 a period of rest. 3 (in full witches' sabbath) a supposed general midnight meeting of witches with the Devil.
[ OE sabat, L sabbatum, & OF sabbat, f. Gk sabbaton f. Heb. sabbat f. sabat to rest ]