occurring every two weeks.
occurring twice a week; semiweekly.

noun, plural bi·week·lies.

a periodical issued every other week.


every two weeks.
twice a week.

Nearby words

  1. bivinyl,
  2. bivoltine,
  3. bivouac,
  4. bivvy,
  5. biwa,
  6. biyearly,
  7. biysk,
  8. biz,
  9. bizarre,
  10. bizarrely

Origin of biweekly

First recorded in 1880–85; bi-1 + weekly

Can be confusedbimonthly biweekly semimonthly (see usage note at bi-1)biweekly semiweekly (see usage note at bi-1)

Usage note

See bi-1. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bi-weekly

British Dictionary definitions for bi-weekly


adjective, adverb

every two weeks
(often avoided because of confusion with sense 1) twice a week; semiweeklySee bi- 1

noun plural -lies

a periodical published every two weeks
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for bi-weekly



also bi-weekly, 1865, from bi- + weekly. The sense "twice a week" is the first attested, but that of "every two weeks" is equally implied.

Online Etymology Dictionary, © 2010 Douglas Harper