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  • gum
    gum
    noun
    any of various viscid, amorphous exudations from plants, hardening on exposure to air and soluble in or forming a viscid mass with water.
  • GUM
    GUM
    abbreviation
    genitourinary medicine
Synonyms

gum

1 American  
[guhm] / gʌm /

noun

  1. any of various viscid, amorphous exudations from plants, hardening on exposure to air and soluble in or forming a viscid mass with water.

  2. any of various similar exudations, as resin.

  3. a preparation of such a substance, as for use in the arts or bookbinding.

  4. chewing gum.

  5. mucilage; glue.

  6. rubber.

  7. gum tree.

  8. Philately. the adhesive by which a postage stamp is affixed.

  9. Informal. a rubber overshoe or boot.


verb (used with object)

gummed, gumming
  1. to smear, stiffen, or stick together with gum.

  2. to clog with or as if with some gummy substance.

verb (used without object)

gummed, gumming
  1. to exude or form gum.

  2. to become gummy.

  3. to become clogged with a gummy substance.

verb phrase

  1. gum up to spoil or ruin.

idioms

  1. gum up the works. work.

gum 2 American  
[guhm] / gʌm /

noun

  1. Also called gingiva.  Often gums the firm, fleshy tissue covering the alveolar parts of either jaw and enveloping the necks of the teeth.


verb (used with object)

gummed, gumming
  1. to masticate (food) with the gums instead of teeth.

  2. to shape or renew the teeth of (a saw), as by grinding.

idioms

  1. beat one's gums, to talk excessively or ineffectively.

gum 3 American  
[guhm] / gʌm /

idioms

  1. by gum, (used as a mild oath).


gum 1 British  
/ ɡʌm /

noun

  1. any of various sticky substances that exude from certain plants, hardening on exposure to air and dissolving or forming viscous masses in water

  2. any of various products, such as adhesives, that are made from such exudates

  3. any sticky substance used as an adhesive; mucilage; glue

  4. short for kauri gum

  5. See chewing gum bubble gum gumtree

  6. a gumdrop

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to cover or become covered, clogged, or stiffened with or as if with gum

  2. (tr) to stick together or in place with gum

  3. (intr) to emit or form gum

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
GUM 2 British  

abbreviation

  1. genitourinary medicine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gum 3 British  
/ ɡʌm /

noun

  1. Technical name: gingiva.  the fleshy tissue that covers the jawbones around the bases of the teeth

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gum 4 British  
/ ɡʌm /

noun

  1. used in the mild oath by gum!

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gum 1 Scientific  
/ gŭm /
  1. Any of various sticky substances that are produced by certain plants and trees and dry into brittle solids soluble in water. Gums typically are colloidal mixtures of polysaccharides and mineral salts.


gum 2 Scientific  
/ gŭm /
  1. See gingiva


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.

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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

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

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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