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

Areas in the Rocky Mountains that have burned recently and received abundant rain and snow are good places to look for morel mushrooms. USA TODAY, "Summer snow, yellow jacket super nests, laundered cat: News from around our 50 states," 26 June 2019 What to Drink: In between trips to Beer Lands and Cocktail Magic, head to the Bubble Tea Party area and knock back a boba tea while sitting under a giant mushroom. Blake Ryan, Billboard, "A Guide to Summer Music Festival Season 2019," 24 June 2019 But trust, your dad will love growing his own mushrooms then cooking them himself. Kelsey Stiegman, Seventeen, "19 Inexpensive Father's Day Gifts Your Dad Will Actually Want," 4 June 2019 The protein resembles a mushroom, made up of a cap (head) and a stem (stalk). Debbie Ponchner, Scientific American, "New Finding Advances the Search for a Universal Flu Vaccine," 3 June 2019 Add mushrooms and cook, tossing occasionally, until golden brown, 3 to 4 minutes; transfer to a plate. Woman's Day Kitchen, Woman's Day, "Vegetarian Fried Rice," 15 Feb. 2019 Add cremini mushrooms, season with salt and pepper and cook, stirring occasionally, until browned, 5 minutes. Anna Helm Baxter, Good Housekeeping, "Beef Stroganoff," 24 Oct. 2018 Coprinellus disseminatus, a white-capped mushroom, has 143, each able to find a partner among the 142 others. Quanta Magazine, "Why Nature Prefers Couples, Even for Yeast," 17 July 2018 Add mushrooms and sauté for 6 minutes or until lightly browned. Kim Sunée, Anchorage Daily News, "How to bring out the best in wild Alaska scallops," 22 Mar. 2018

Recent Examples on the Web: Verb

In fact, North Korean health officials were quietly tracking a mushrooming AIDS threat. Richard Stone, Science | AAAS, "Exclusive: North Korea claimed to be free of HIV. But infections appear to be surging," 24 June 2019 Since its filing, the case has pingponged among administrative, district and appeals courts, and the files have mushroomed to more than 1,000 pages. Andrea Gallo, ProPublica, "Why the “Most Egregious” Ethics Case in Louisiana Remains Open Nine Years Later," 16 May 2019 The Final Four has mushroomed even since the last time the Alamodome hosted in 2008. Rachel Bachman And Jared Diamond, WSJ, "Remember the Alamodome? The Final Four Might Not Be Back," 2 Apr. 2018 Augmentation teams are typically deployed before a situation has mushroomed into a crisis. Dan Lamothe, Washington Post, "Marines reinforce U.S. compounds as violence flares after Trump moves embassy to Jerusalem," 14 May 2018 The office also is expected to hire more staff to deal with mushrooming demand for records, the person said. Rebecca Ballhaus, WSJ, "Trump Likely to Face Aggressive Oversight From House Democrats," 7 Nov. 2018 Explosion of the ‘Cons As San Diego’s Comic-Con has steadily mushroomed in size and popularity over the years so, too, has the sheer number of comics-centric conventions around the U.S. and the world. Lori Weisberg, sandiegouniontribune.com, "No Marvel or HBO? No big deal, San Diego Comic-Con observers say," 25 June 2018 Once a fringe home accoutrement favored by eco-conscious consumers, solar does appear poised to mushroom as costs come down and homeowners welcome reduced utility bills. Marco Della Cava, USA TODAY, "Burning for Tesla Powerwall? Get ready to wait as Musk's solar vision takes a backseat to Model 3," 13 July 2018 Image As educational debt continues to mushroom, younger workers often have to choose between paying off their student loans and saving for retirement. Ann Carrns, New York Times, "To Draw Workers, Employers Offer to Help With Student Loans," 26 June 2018

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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Statistics for mushroom

Last Updated

7 Jul 2019

Look-up Popularity

Time Traveler for mushroom

The first known use of mushroom was in the 15th century

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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
: to collect wild mushrooms

mushroom

noun
mush·​room | \ ˈməsh-ˌrüm How to pronounce mushroom (audio) , -ˌru̇m\

Kids Definition of mushroom

 (Entry 1 of 2)

: a part of a fungus that bears spores, grows above ground, and suggests an umbrella in shape

mushroom

verb
mushroomed; mushrooming

Kids Definition of mushroom (Entry 2 of 2)

: to appear or develop suddenly or increase rapidly The town's population has mushroomed.

mushroom

noun
mush·​room | \ ˈməsh-ˌrüm How to pronounce mushroom (audio) , -ˌru̇m How to pronounce mushroom (audio) \

Medical Definition of mushroom

1 : an enlarged complex fleshy fruiting body of a fungus (as most basidiomycetes) that arises from an underground mycelium and consists typically of a stem bearing a spore-bearing structure especially : one that is edible — compare toadstool

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