four·​fold ˈfȯr-ˌfōld How to pronounce fourfold (audio)
: being four times as great or as many
: having four units or members
fourfold adverb

Example Sentences

There has been a fourfold increase in membership this year.
Recent Examples on the Web However, a fourfold increase in neutralizing antibodies is impressive—and thought to represent a clinically meaningful difference in protection. Beth Mole, Ars Technica, 4 Nov. 2022 The new booster triggered a fourfold increase in Omicron-blocking antibody levels against the BA.4/BA.5 version of Omicron compared with the old booster in older adults. Carolyn Y. Johnson,, 4 Nov. 2022 Natural gas prices last month were 52% higher than in September 2021, and were up more than fourfold since bottoming out as the coronavirus pandemic took hold in May 2020, according to the U.S. Energy Information Administration. Karl Ebert, Journal Sentinel, 12 Oct. 2022 Orders have surged more than fourfold, and customers now have to wait until March for delivery, compared with as little as four weeks a year ago. Josefine Fokuhl, Fortune, 8 Oct. 2022 Ford’s electric vehicle sales were up fourfold last month compared to the same time last year. Todd Spangler, Detroit Free Press, 8 Sep. 2022 This year, the Forest Service laid out new plans to focus on outcomes and ramp up treatments fourfold in the West, reducing risk on 20 million acres in the next decade. Adiel Kaplan, NBC News, 9 Aug. 2022 Brown counts his greatest achievement as president to be the fourfold increase in financial aid offered by the university and the rise in minority and first generation students at BU. Alexander Thompson,, 7 Sep. 2022 Haft said their use increased more than fourfold since the beginning of the year. Erin Cox, Washington Post, 9 June 2022 See More

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

Word History


Middle English, from Old English fēowerfeald, from fēower + -feald -fold

First Known Use

before the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of fourfold was before the 12th century

Dictionary Entries Near fourfold

Cite this Entry

“Fourfold.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2022.

Kids Definition



four·​fold -ˌfōld How to pronounce fourfold (audio)
: being four times as great or as many

More from Merriam-Webster on fourfold

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