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biweekly

[bahy-week-lee] /baɪˈwik li/
adjective
1.
occurring every two weeks.
2.
occurring twice a week; semiweekly.
noun, plural biweeklies.
3.
a periodical issued every other week.
adverb
4.
every two weeks.
5.
twice a week.
Origin of biweekly
1880-1885
1880-85; bi-1 + weekly
Can be confused
bimonthly, biweekly, semimonthly (see usage note at bi-)
biweekly, semiweekly (see usage note at bi-)
Usage note
See bi-1.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for biweekly

biweekly

/baɪˈwiːklɪ/
adjective, adverb
1.
every two weeks
2.
(often avoided because of confusion with sense 1) twice a week; semiweekly See bi-1
noun (pl) -lies
3.
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
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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.

Online Etymology Dictionary, © 2010 Douglas Harper
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