BIWEEKLY Meaning of BIWEEKLY in English adv., adj., & n. --adv. 1. every two weeks. 2 twice a week. --adj. produced or occurring biweekly. --n. (pl. -ies) a biweekly periodical. Usage: See the note at bimonthly. Oxford English vocab. Оксфордский английский словарь. 2012