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To all those who are thinking of removing one or other of the two opposing definitions. The two definitions (once every 2 months, and twice a month) are both correct and should remain in the entry. -- ALGRIF talk 15:06, 9 March 2010 (UTC)

G. &C. Merriam, Webster's New Collegiate Dictionary 1973, 1981 agrees!

Mydogtrouble 16:15, 15 March 2010 (UTC)

I don't know why there's confusion. I get paid a check biweekly, which means every two weeks, not twice a week. Likewise my magazine subscription arrives bimonthly, or every two months. It seems perfectly clear. ----- 10:46, 21 May 2010 (UTC)
Just because it seems clear to you, doesn't mean there isn't confusion elsewhere. :) Dracunculus 20:43, 10 February 2011 (UTC)

Not Confusion, Just Persistent Error[edit]

The erroneous use of "bimonthly" when "semimonthly" is intended has become so prevalent that it has achieved "correct" status according to some sources. I say, "Pfui!". "Bimonthly" means every two months, period.

Bi - 2 , Monthly - In a month.... Bi Monthly is once in two months... Straight, Simple and Clear

From American Heritage Dictionary: "The prefix bi-, when modifying an adverb of time, means that the time interval should be doubled. Thus a bimonthly meeting takes place once every two months, and a biweekly meeting once every two weeks. The prefix semi-, in the same context, means that the interval of time should be halved. Thus, a semimonthly meeting is held twice a month (that is, every half month), and a semiweekly meeting twice a week. Words with the prefix bi- and semi- are often confused, so expressions such as every two months or twice a month are often preferable in order to avoid misinterpretation." 00:37, 28 February 2014 (UTC)