weekn.[OE. weke, wike, woke, wuke AS. weocu, wicu, wucu; akin to OS. wika, OFries. wike, D. week, G. woche, OHG. wohha, wehha, Icel. vika, Sw. vecka, Dan. uge, Goth. wik, probably originally meaning, a succession or change, and akin to G. wechsel change, L. vicis turn, alternation, and E. weak. Cf. Weak.] A period of seven days, usually that reckoned from one Sabbath or Sunday to the next.()I fast twice in the week. (Luke xviii. 12.)()Feast of Weeks. See Pentecost, 1. -- Prophetic week, a week of years, or seven years. Dan. ix. 24. -- Week day. See under Day.()