The cardinal number that is the sum of six and one; SYN. 7, VII, sevener, heptad, septet.

ETYM Old Eng. weke, wike, woke, wuke AS. weocu, wicu, wucu.
(Homonym: weak).
1. A period of seven consecutive days starting on Sunday; SYN. calendar week.
2. Any period of seven consecutive days; SYN. hebdomad.

ETYM Old Eng. seven, seoven, seofen, AS. seofon, seofan, seofen.
Being one more than six; SYN. 7, vii.