/buy week"lee/ , adj., n., pl. biweeklies , adv.
adj.
1. occurring every two weeks.
2. occurring twice a week; semiweekly.
n.
3. a periodical issued every other week.
adv.
4. every two weeks.
5. twice a week.
[ 1880-85; BI- 1 + WEEKLY ]
Usage . See bi- 1 .