ce·ment | \ si-ˈment also ˈsē-ment \

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

bond, cord, knot, ligature, link, tie

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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

As global population grows, some estimates suggest cement production could increase by as much as 23 percent by 2050. Chelsea Harvey, Scientific American, "Cement Producers Are Developing a Plan to Reduce CO2 Emissions," 9 July 2018 The property, one of the last fortresses left in Southwest Texas, has about 20 standing buildings, each with rock walls and cement floors. S.m. Chavey, San Antonio Express-News, "West Texas ghost town hits the market," 5 July 2018 Neighboring Hungary and Romania are both under fire for weakening their own judges and prosecutors in ways that cement ruling party control. Protestors in both have expressed solidarity with their Polish counterparts. Natalia Ojewska, WSJ, "Polish Chief Justice Defies Government’s Supreme Court Overhaul," 4 July 2018 Even more egregious are U2 and Jay-Z, who have used recent albums to cement partnerships with massive technology conglomerates. Chris Richards, chicagotribune.com, "The 5 hardest questions in pop music," 3 July 2018 With ballots collected instead in empty jerrycans and even a cement mixer, the former president still won 99.8% of votes. The Economist, "Democracy is foundering in the Maldives," 21 June 2018 Malik Monk played some point guard in the season’s last handful of games, but to say there’s a large enough sample size from that to cement Monk as Walker’s backup would be more hopeful than accurate. Rick Bonnell, charlotteobserver, "Charlotte Hornets GM Mitch Kupchak on trades, needs and draft challenges," 19 June 2018 Stoffel has also been known to dig holes underneath the cement walls that pen him in. Amanda Erickson, Washington Post, "Hero crayfish amputates his own claw to avoid being boiled alive," 4 June 2018 Mark had gotten convinced that what would make Facebook really popular and just sort of cement its position at schools was a way to send files around to other people—mostly just to trade music. Adam Fisher, WIRED, "Sex, Beer, and Coding: Inside Facebook’s Wild Early Days," 10 July 2018

Recent Examples on the Web: Verb

Nike has been Federer’s clothing sponsor for his entire pro career and has created memorable looks, especially at Wimbledon, that have cemented his status as a fashion plate. Naila-jean Meyers, New York Times, "Roger Federer Sheds Nike Swoosh for Uniqlo, Then Wins Match," 2 July 2018 In honor of Cleveland's 68th birthday, a look back at the striking beauty that cemented her status as one of the fashion world's most beloved renegades. Lauren Valenti, Vogue, "Happy 68th Birthday, Pat Cleveland! Why the Supermodel is a Beauty Icon to This Day," 23 June 2018 Spoiler alert: Olympic figure skater Adam Rippon and his pro partner Jenna Johnson won Dancing With the Stars: Athletes last night, capping off a string of high-scoring performances that cemented their status as season-long frontrunners. Caroline Picard, Good Housekeeping, "The "Dancing With the Stars" Finale Made Fans Livid," 22 May 2018 With the stroke of his pen and, of course, his affable personality, T.I. cemented his place as a legend. Carl Lamarre, Billboard, "T.I. Reveals His Favorite Roles, Talks J Prince's Business Influence & Explains Kanye West's Current Mind-Set," 18 June 2018 History's greats, from Zidane of France to Pelé of Brazil to Argentina's own Maradona, have cemented their legacies with a Cup. Brad Rickman, Condé Nast Traveler, "The Loneliness of the American Soccer Fan," 15 June 2018 With his Belmont Stakes win, Justify cemented his place in horse racing history books. Jenna West, SI.com, "Triple Crown Winner Justify Raced Into the History Books and Twitter Was in Awe," 9 June 2018 Over the years, Detroit’s bizarre business model has been steadily cemented into place with numerous acts of congressional and regulatory opportunism. WSJ, "Your Pickup Truck Takes You for a Ride," 30 Mar. 2018 The Crusaders cemented their lasting legacy with an 83-77 overtime victory over Florida State two days later. Mike Hutton, chicagotribune.com, "Timing was right for Bryce Drew and Valparaiso to capture nation's attention with 'The Shot'," 18 Mar. 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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Phrases Related to cement

cement mixer

Statistics for cement

Last Updated

8 Sep 2018

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 \

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 \

Medical Definition of cement 

1 : cementum

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

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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).


the setting in which something occurs

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