bi·​month·​ly | \ (ˌ)bī-ˈmən(t)th-lē How to pronounce bimonthly (audio) \

Definition of bimonthly

 (Entry 1 of 3)

1 : occurring every two months
2 : occurring twice a month : semimonthly


bi·​month·​ly | \ (ˌ)bī-ˈmən(t)th-lē How to pronounce bimonthly (audio) \

Definition of bimonthly (Entry 2 of 3)

1 : once every two months
2 : twice a month


bi·​month·​ly | \ (ˌ)bī-ˈmən(t)th-lē How to pronounce bimonthly (audio) \

Definition of bimonthly (Entry 3 of 3)

: a bimonthly publication

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What do bimonthly and biweekly mean?: Usage Guide


Many people are puzzled about bimonthly and biweekly, which are often ambiguous because they are formed from two different senses of bi-: "occurring every two" and "occurring two times." This ambiguity has been in existence for nearly a century and a half and cannot be eliminated by the dictionary. The chief difficulty is that many users of these words assume that others know exactly what they mean, and they do not bother to make their context clear. So if you need bimonthly or biweekly, you should leave some clues in your context to the sense of bi- you mean. And if you need the meaning "twice a," you can substitute semi- for bi-. Biannual and biennial are usually differentiated.

Examples of bimonthly in a Sentence

Adjective Undercover officers attended and videotaped some of the weekly or bimonthly fights held at eight secluded sites in Harris County. — Jennifer Leahy & Roma Khanna, Houston Chronicle, 16 Nov. 2008 Computer Book Review, a bimonthly magazine, carries reviews of 45-50 books in computer-related fields in each issue.  … In the November/December issue, the Review publishes an annual buying guide containing summaries of the year's reviews. Publishers Weekly, 3 June 1983 The group holds bimonthly meetings in January, March, May, and so on. The group holds bimonthly meetings on the first and third Tuesday of each month. Adverb Opponents argued that the change is unnecessary and that it could result both in less productivity for the council and confusion for residents accustomed to watching council meetings on television. Supporters countered that meeting bimonthly will allow for lengthy subcommittee discussions on the off weeks. Subcommittee meetings also are televised live. — Michael Lafleur, Lowell (Massachusetts) Sun, 14 May 2008 This column will now appear bimonthly beginning with the March 15 issue.  … we think we can cover quite handily the year's work from Christian publishers in six columns, leaving some space in the unscheduled months for the occasional feature column, such as a roundup of best books. Booklist, 15 Jan. 1995 Noun The original five Mental Floss staffers had no journalistic experience, except for one kid who'd worked on his high-school newspaper. Now they run a bimonthly with 10,000 subscribers and a newsstand presence of 50,000 copies. — Mary Carmichael, Newsweek, 23 Dec. 2002
Recent Examples on the Web: Adjective That $2,725 spread across 24 bimonthly paychecks is about $113 in additional income per pay stub, which may not sound as enticing as a bigger lump sum. Aimee Picchi, USA TODAY, "Tax season 2020: Most Americans don't understand how tax refunds work, and it might cost them," 30 Dec. 2019 For a real shocker, head to the Spectacle, an adventurous micro-cinema in Williamsburg, for its Sunday Blood Brunch, a bimonthly horror matinee where the movie is a surprise. New York Times, "Summer Chills: A Horror Fan’s Guide to What to Watch Right Now," 15 Aug. 2019 At times the bimonthly publications have been devoted to specific themes, such as women and minorities who served in America's armed forces. Brian Albrecht,, "Veterans' stories don't end with military discharge in the DD214 Chronicle (photos,video)," 2 May 2018 In 2010, Zordel was recruited to run Project Homeless Connect, a bimonthly day of service for homeless people that’s usually held at Bill Graham Civic Auditorium. Heather Knight, San Francisco Chronicle, "One of SF’s biggest helpers for homeless people is leaving town," 24 Oct. 2017 That means a reduction of about $7.90 on the bimonthly bill of an average household using about 416 gallons per day, or about a $3.95 per month decline. Denis Cuff, The Mercury News, "Water rates to drop in one East Bay water district," 1 June 2017 Most households will pay an extra $3.40 per month, or $6.80 per bimonthly billing cycle, for the new service. Sven Berg, idahostatesman, "Composting is coming to Boise. Now what?," 12 May 2017 Mattan Schuchman, a Johns Hopkins physician specializing in geriatrics, makes regular monthly or bimonthly house calls to homebound patients. Hayley Tsukayama,, "Doctor on demand: How app culture is reviving the house call," 26 June 2017 Working with Lake Flato, the sustainable architecture firm behind her Austin properties, Lambert and her team at Bunkhouse Hospitality did a deep dive into the regional culture and design, making bimonthly research trips for four years. Condé Nast Traveler, "Hotel San Cristóbal," 2 June 2017 Recent Examples on the Web: Adverb The hikes ranged from 88 cents bimonthly during the 2009-10 fiscal year to $10.25 bimonthly for the 2015-16 fiscal year. Alejandra Reyes-velarde,, "CVWD set to vote on increasing residents’ monthly water bills by average of $5," 22 June 2018 The GenForward Survey is a bimonthly, nationally representative survey of young adults, with particular focus on how race and ethnicity shape political attitudes. Matthew Fowler, Washington Post, "Why 41 percent of white millennials voted for Trump," 15 Dec. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bimonthly.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of bimonthly


1832, in the meaning defined at sense 1


1846, in the meaning defined at sense 1


1839, in the meaning defined above

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Time Traveler for bimonthly

Time Traveler

The first known use of bimonthly was in 1832

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Cite this Entry

“Bimonthly.” Dictionary, Merriam-Webster, Accessed 4 Jun. 2020.

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More Definitions for bimonthly


How to pronounce bimonthly (audio)

English Language Learners Definition of bimonthly

: occurring every two months
: occurring twice a month

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Thesaurus: All synonyms and antonyms for bimonthly

Spanish Central: Translation of bimonthly

Nglish: Translation of bimonthly for Spanish Speakers

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