ce·​ment | \ si-ˈment also ˈsē-ment How to pronounce cement (audio) \

Definition of cement

 (Entry 1 of 2)

1a : concrete
b : a powder of alumina, silica, lime, iron oxide, and magnesium oxide burned together in a kiln and finely pulverized and used as an ingredient of mortar and concrete also : any mixture used for a similar purpose
2 : a binding element or agency: such as
a : a substance to make objects adhere to each other
b : something serving to unite firmly justice is the cement that holds a political community together— R. M. Hutchins
3 : cementum
4 : a plastic composition made especially of zinc or silica for filling dental cavities
5 : the fine-grained groundmass or glass of a porphyry


cemented; cementing; cements

Definition of cement (Entry 2 of 2)

transitive verb

1 : to unite or make firm by or as if by cement Pebbles were cemented together by clay. has cemented his role as a leader on the team— T. W. Smith
2 : to overlay with concrete cemented the cellar floor

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Other Words from cement


cementer noun

Synonyms for cement

Synonyms: Noun

adhesive, bond, glue, size

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Examples of cement in a Sentence


There is a layer of cement under the bricks. what kind of cement works best on glass and pottery?


A win would cement her reputation as a strong competitor.
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Recent Examples on the Web: Noun

The Cygnus holds a student cement-mixing experiment, as well as an atom-cooling chamber from NASA's Jet Propulsion Laboratory that uses lasers to get temperatures colder than even space itself. OrlandoSentinel.com, "NASA shipper Orbital ATK launches space-station supplies," 21 May 2018 Lidia looks down at the cold cement floor, not knowing how to answer her husband. Lauren Bohn, Marie Claire, "Who Killed Claudia Gomez?," 2 May 2019 Naadam’s Prince Street store may just be the ultimate expression of this new KonMari consumerism: The entire shop carries a single item, a $75 unisex cashmere crew neck sweater in a variety of colors, from camel to cement. Jacob Gallagher, WSJ, "Who Needs Gender? Why Men and Women Are Dressing Identically," 21 Feb. 2019 Now widely considered a masterpiece of erotic fiction, the novel did much to cement Salter’s literary reputation, if not his mass appeal, in the years leading up to his death in 2015. New York Times, "James Salter’s ‘Blue, Indolent’ Corner of Burgundy," 5 June 2018 During the recent installation of his invention, Babcock leaned from the basket of an orange hydraulic lift and poured a bucket of cement into the cylinder of a 13-foot-tall device named Mechanical Babe. Vincent T. Davis, San Antonio Express-News, "Elephants at Zoo receive enrichment project from UTSA Honors College students," 10 Apr. 2018 Large-scale cement tiles on the floor balance the coffered wood ceiling— and make floor clean-up a breeze. Joanna Linberg, Sunset, "Stunning DIY Renovation Brightens a Spanish Colonial Revival Home," 22 Jan. 2018 Using the copper's orange tones as a counterpoint, Kletzien opted for blue throughout the space, arranging the large-scale cement tiles in an irregular pattern on the wall. Hadley Keller, House Beautiful, "Creative Tile Turns a Scary '90s Bathroom Into a Fresh, Fun Space," 27 Feb. 2019 Some materials, such as cement, dark rocks or even sand, can get very hot when left in the sun for a while. Science Buddies, Scientific American, "Warm in the Sun," 12 July 2018

Recent Examples on the Web: Verb

Trump said his decision would cement the Jewish state’s ability to defend itself from regional threats should a broad Arab-Israeli peace deal ever be reached. Deb Riechmann, The Seattle Times, "Trump signs declaration reversing US policy on Golan Heights," 26 Mar. 2019 Almost eight years later, a finals win this Saturday would cement Sage Kimzey atop the PRCA bull riding standings. Carter Karels, San Antonio Express-News, "Injury doesn’t stop Kimzey from competing at San Antonio Rodeo," 22 Feb. 2018 One of the more lengthy discussions on the show was the current state of the Pelicans and how the team could go about really cementing their place as the city's go-to when football season ends. Clyde Verdin, NOLA.com, "Styx and stones | 'Dunc & Holder' Thursday podcasts," 15 Feb. 2018 School board approval would likely cement West End as the preferred site. Sharon Coolidge, Cincinnati.com, "FC Cincinnati wants to move Stargel for Major League Soccer stadium; school board mum," 12 Feb. 2018 In my mind, that’s the day that cemented the fact that Dwight [the greatest player in Magic history] would leave and Van Gundy [the greatest coach in Magic history] would be fired. Mike Bianchi, OrlandoSentinel.com, "Worst day of Dwight Howard's life was also one of worst days in Orlando Magic history," 18 June 2018 His name was rarely on the scientific papers announcing the results or on the patents that cemented their commercial utility. Aaron Gilbreath, Longreads, "We Are Scientists," 5 June 2018 View 53 Photos Those who want to cement their status as early adopters should seek out the special G63 Edition 1, which only is available for the G63’s first model year. Greg Fink, Car and Driver, "2019 Mercedes-AMG G63: A New G Means New AMGs," 14 Feb. 2018 Myanmar has promised returning Rohingya a form of identity that falls short of citizenship, which Rohingya reject and say would cement their second-class status. Jon Emont, WSJ, "Rohingya, Expelled From Myanmar, Refuse Effort to Return Them," 15 Nov. 2018

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


14th century, in the meaning defined at sense 1a


14th century, in the meaning defined at transitive sense 1

History and Etymology for cement


Middle English sement, from Anglo-French ciment, from Latin caementum stone chips used in making mortar, from caedere to cut

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Statistics for cement

Last Updated

2 Jun 2019

Look-up Popularity

Time Traveler for cement

The first known use of cement was in the 14th century

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More Definitions for cement



English Language Learners Definition of cement

 (Entry 1 of 2)

: a soft gray powder that is mixed with water and other substances to make concrete
: the hard substance that is made when cement is mixed with water and allowed to dry
: a substance that is used to make things stick together



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

: to join (things) together with cement
: to make (something) stronger


ce·​ment | \ si-ˈment How to pronounce cement (audio) \

Kids Definition of cement

 (Entry 1 of 2)

1 : a powder that is made mainly from compounds of aluminum, calcium, silicon, and iron heated together and then ground and mixed with water to make mortar and concrete
3 : a substance used to make things stick together firmly


cemented; cementing

Kids Definition of cement (Entry 2 of 2)

1 : to join together with or as if with cement There were sheets of ice … cementing the tops of the hemlocks in arches.— Jean Craighead George, My Side of the Mountain
2 : to make stronger The experience cemented their friendship.


ce·​ment | \ si-ˈment How to pronounce cement (audio) \

Medical Definition of cement

1 : cementum
2 : a plastic composition made especially of zinc or silica for filling dental cavities

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More from Merriam-Webster on cement

Rhyming Dictionary: Words that rhyme with cement

Thesaurus: All synonyms and antonyms for cement

Spanish Central: Translation of cement

Nglish: Translation of cement for Spanish Speakers

Britannica English: Translation of cement for Arabic Speakers

Britannica.com: Encyclopedia article about cement

Comments on cement

What made you want to look up cement? Please tell us where you read or heard it (including the quote, if possible).


a tendency to relapse

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