I. (ˈ)bī+ adjective
Etymology: bi- (I) + weekly
1. : occurring or appearing every two weeks : having a 2-week interval between recurrences : fortnightly — now usually used with this meaning in respect to publication dates; compare semiweekly
2. : occurring or appearing twice a week : semiweekly — used especially of transportation schedules
II. adverb
1. : every two weeks
2. : twice a week
III. noun
( -es )
1. : a publication issued every two weeks
2. : semiweekly