bi·week·ly 
(bī-wēklē)
(bī-wēklē)adj.
1. Happening every two weeks.
2. Happening twice a week; semiweekly.
n. pl. bi·week·lies
A publication issued every two weeks.
adv.
1. Every two weeks.
2. Twice a week; semiweekly. See Usage Note at bi-1.