gum
1 Americannoun
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any of various viscid, amorphous exudations from plants, hardening on exposure to air and soluble in or forming a viscid mass with water.
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any of various similar exudations, as resin.
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a preparation of such a substance, as for use in the arts or bookbinding.
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mucilage; glue.
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Philately. the adhesive by which a postage stamp is affixed.
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Informal. a rubber overshoe or boot.
verb (used with object)
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to smear, stiffen, or stick together with gum.
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to clog with or as if with some gummy substance.
verb (used without object)
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to exude or form gum.
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to become gummy.
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to become clogged with a gummy substance.
verb phrase
idioms
noun
verb (used with object)
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to masticate (food) with the gums instead of teeth.
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to shape or renew the teeth of (a saw), as by grinding.
idioms
idioms
noun
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any of various sticky substances that exude from certain plants, hardening on exposure to air and dissolving or forming viscous masses in water
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any of various products, such as adhesives, that are made from such exudates
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any sticky substance used as an adhesive; mucilage; glue
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short for kauri gum
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a gumdrop
verb
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to cover or become covered, clogged, or stiffened with or as if with gum
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(tr) to stick together or in place with gum
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(intr) to emit or form gum
abbreviation
noun
noun
Other Word Forms
Etymology
Origin of gum1
First recorded in 1350–1400; Middle English gom(m)e, gum(m)e, from Old French gomme, from Vulgar Latin gumma, for Latin gummi, cummi, commi, from Greek kómmi, from Coptic kommi, from Egyptian kema, kemai, kmjt
Origin of gum2
First recorded in 1275–1325; Middle English gom(m)e, Old English gōma “palate, jaws (in plural),” Old Norse gōmr “roof or floor of the mouth,” German Gaumen “palate”
Origin of gum3
First recorded in 1825–35; euphemism for God
Explanation
Gum is a sticky substance that oozes out of a tree or another plant, and chewing gum is the stuff you blow bubbles with or stick under your desk. Yuck. Natural gum has many uses, including as a thickener in food products. Chewing gum, however, has only one real use: it's made to be chewed but not swallowed. This kind of gum often has a fruity or minty flavor, and can sometimes be blown into bubbles. When you gum something up, you clog or block it — or you make it sticky. Completely different gums are the soft flesh inside your mouth where your teeth are rooted.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
But they bought more chewing gum, mouthwash and hair dyes - products that counter common GLP-1 side effects like thinning hair and bad breath.
From BBC ● Jul. 7, 2026
El-Obeid hosts an infantry division, an air base, a key oil pipeline and a major tree gum market.
From Barron's ● Jun. 29, 2026
Compared with the control group, participants who completed the fasting program showed lower levels of inflammation-related markers in both their blood and gum tissue.
From Science Daily ● Jun. 12, 2026
A day never passed when I didn’t have a jumbo pack of gum or a roll of Life Savers in my pocket.
From The Wall Street Journal ● Jun. 9, 2026
“You believed in me. You’ve never put gum in my hair or tripped me while I was walking or stolen my lunch money. Believe me, you’re special in my book.”
From "The Way to Rio Luna" by Zoraida Cordova
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Detsky Mir has one big advantage for recently-exfiltrated Soviet spies over better known department stores like GUM: It’s a toy store.
From Slate ● May 31, 2018
As the News & Record’s Nancy McLaughlin reported this week, GUM today is supported by more than 200 congregations that represent a variety of faiths.
From Washington Times ● May 2, 2018
Oblivious to recent tensions, crowds of tourists, many Russian-speaking, wandered around the Kremlin walls and St. Basil’s Cathedral on Red Square and the nearby mall inside the famous GUM department store.
From Seattle Times ● Apr. 20, 2018
It reminds me of Moscow’s GUM department store in the days of the Soviet Union.
From Washington Post ● Sep. 23, 2017
GUM CISTUS.—The gum labdanum is procured from this shrub, and is its only produce used in medicine.
From The Botanist's Companion, Volume II by Salisbury, William
But conditions worsened Friday when they discovered they could not offload a neutralizing agent in the failing tank because the valves had broken and were gummed up.
From Los Angeles Times ● May 23, 2026
That gummed up credit markets, tanked the value of money-market funds, and sent global stock markets into a tailspin.
From Barron's ● Mar. 13, 2026
That gummed up financing and logistics for Arctic LNG 2 and stopped South Korean shipbuilders from delivering to the project.
From The Wall Street Journal ● Oct. 26, 2025
In a memo to employees, Fiddelke said he was trying to clear up “complexity” that gummed up decision-making and made it harder to deliver on ideas, according to the Journal.
From MarketWatch ● Oct. 26, 2025
Instead my feet had gummed to the sidewalk as he handed her into the Ford and they drove away.
From "The Red Car to Hollywood" by Jennie Liu
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That is gumming up private-equity’s tried-and-true formula of raising money from investors to buy companies, then flipping them for a profit a few years later.
From The Wall Street Journal ● Dec. 28, 2025
And despite the claims that she’s gumming up the state’s process with her appeals, Gilbert has never actually reversed a council decision.
From Salon ● Aug. 17, 2025
But for a few hours a day, the 4-month-old pygmy hippo springs to life, gumming on leaves, zooming around the compound and tossing her head in a silent, open-mouthed roar.
From Los Angeles Times ● Nov. 25, 2024
Because of its eagerness to enter into chemical reactions, "sulfur compounds tend to be more unstable, posing hazards to lab personnel and equipment, clogging up instrumentation and gumming up experiments."
From Science Daily ● Mar. 13, 2024
Harvey sat at another, gumming away at his food.
From "The Dead and the Gone" by Susan Beth Pfeffer
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.