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biweekly

[bahy-week-lee]
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adjective
  1. occurring every two weeks.
  2. occurring twice a week; semiweekly.
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noun, plural bi·week·lies.
  1. a periodical issued every other week.
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adverb
  1. every two weeks.
  2. twice a week.
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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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for biweekly

biweekly

adjective, adverb
  1. every two weeks
  2. (often avoided because of confusion with sense 1) twice a week; semiweeklySee bi- 1
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noun plural -lies
  1. a periodical published every two weeks
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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 biweekly

adj.

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.

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Online Etymology Dictionary, © 2010 Douglas Harper