mushroom

noun
mush·​room | \ ˈməsh-ˌrüm How to pronounce mushroom (audio) , -ˌru̇m; chiefly Northern and Midland US -ˌrün; dialectal ˈmə-shə-ˌrüm, -ˌru̇m, -ˌrün\

Definition of mushroom

 (Entry 1 of 2)

1a : an enlarged complex aboveground fleshy fruiting body of a fungus (such as a basidiomycete) that consists typically of a stem bearing a pileus especially : one that is edible
b : fungus
2 : upstart
3 : something resembling a mushroom

mushroom

verb
mushroomed; mushrooming; mushrooms

Definition of mushroom (Entry 2 of 2)

intransitive verb

1a : to well up and spread out laterally from a central source
b : to become enlarged or extended : grow
2 : to collect wild mushrooms
3 : to spring up suddenly or multiply rapidly

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Examples of mushroom in a Sentence

Noun

cut up some mushrooms for the salad

Verb

Interest in local history is suddenly mushrooming. Her hobby mushroomed into a thriving business. He goes mushrooming in the spring every year.
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Recent Examples on the Web: Noun

Fueled by a dose of psychedelic mushrooms and a seemingly bottomless reservoir of anger toward Poole, Brennan began building 8chan in October 2013. Timothy Mclaughlin, WIRED, "The Weird, Dark History of 8chan," 6 Aug. 2019 The altercation outside the McDonald’s stemmed from police conducting an undercover operation into alleged sales of psilocybin mushrooms in the Aspen Hill area. Dan Morse, Washington Post, "Police officer charged with assault after allegedly using leg to slam suspect’s head into sidewalk," 9 July 2019 Last month, Denver became the first city in the U.S. to decriminalize the use of psilocybin mushrooms. Alexis Reliford, refinery29.com, "AOC Wants It To Be Easier To Study Magic Mushrooms & Other Psychedelics," 10 June 2019 Brush both sides of mushrooms with sauce and allow to marinate 10 minutes. Darlene Zimmerman, Detroit Free Press, "5 easy and tasty ways for safer grilling," 20 July 2019 No one really knows why fire triggers the mushrooming of the mushrooms. Allyson Reedy, The Know, "Extremely rare, coveted mushrooms that only appear after a wildfire are popping up in southern Colorado," 18 July 2019 What’s more, the team’s analysis of cicadas infected with Massospora platypediae and Massospora levispora revealed that the fungi were producing psilocybin, the hallucinogenic chemical found in certain types of mushrooms. Brigit Katz, Smithsonian, "A Fungus Causes Cicadas to Mate Like Crazy, Even After Their Butts Fall Off," 29 June 2019 Denver and Oakland recently approved the decriminalization of psychedelic mushrooms. Author: Justin Jouvenal, Anchorage Daily News, "No charges for personal drug possession: Seattle’s bold gamble to bring ‘peace’ after the war on drugs," 24 June 2019 Illicit online drug sales have grown in complexity and volume since the shutdown of Silk Road, the original dark net market that came online in 2011 and initially offered only a small selection of psychedelic mushrooms. New York Times, "Dark Web Drug Sellers Dodge Police Crackdowns," 11 June 2019

Recent Examples on the Web: Verb

These qualms mushroomed into a currency crisis last year. The Economist, "Argentina faces the prospect of another default," 15 Aug. 2019 The original Isle of Wight Festival in the United Kingdom, which predated Woodstock by a year, mushroomed from a crowd of 10,000 in the summer of 1968 to 150,000 the following year, when the lineup included a Bob Dylan comeback of sorts. James Sullivan, BostonGlobe.com, "There could only be one Woodstock," 15 Aug. 2019 Posts on the Facebook page, which has 291,245 followers, quickly mushroomed, with many more photos and Air Force documents, one a spreadsheet listing issues with dorm rooms. Sig Christenson, ExpressNews.com, "S.A. general vows to battle mold at Lackland," 28 July 2019 The current scandal mushroomed from the work of a pair of internet-savvy collectors, who unearthed information over the past three months implicating figures considered fixtures in the hobby. oregonlive.com, "Baseball card collectors suspect rampant fraud in their hobby," 19 July 2019 After all, Netflix's subscriber count has continued to mushroom even though some of the most buzz-worthy shows on TV can't be found there. Paul R. La Monica, CNN, "Netflix may not need old media thanks to 'Stranger Things' and other new hits," 3 July 2019 Within a few months, camps began to mushroom throughout the country, with about two hundred boys in each. Hubert H. (hubert Horatio) Humphrey, Harper's magazine, "Into the Woods," 10 June 2019 In their paper, Kaplan and his colleagues point to mushroom chitosan, a fibrous material found in the cell wall of mushrooms, as one potential scaffolding material. Matt Simon, WIRED, "Tired: Eating Bugs. Wired: Eating Bug Meat Grown in a Lab," 3 June 2019 The administration’s sensitivity on that front mushroomed into a broader trade dispute between the U.S. and China—which in turn iced out the... Dan Gallagher, WSJ, "Broadcom: Follow the Money," 13 Mar. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mushroom.' 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 mushroom

Noun

15th century, in the meaning defined at sense 1a

Verb

1893, in the meaning defined at sense 1a

History and Etymology for mushroom

Noun

Middle English musheron, from Anglo-French musherum, musseron, from Late Latin mussirion-, mussirio

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More Definitions for mushroom

mushroom

noun

English Language Learners Definition of mushroom

 (Entry 1 of 2)

: a fungus that is shaped like an umbrella especially : one that can be eaten

mushroom

verb

English Language Learners Definition of mushroom (Entry 2 of 2)

: to increase or develop very quickly