1
a
: 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
R. M. Hutchins3
: 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
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
T. W. Smith2
: to overlay with concrete
cemented the cellar floor
: to become cemented
cementer
noun
Synonyms
Examples of cement in a Sentence
Noun
There is a layer of cement under the bricks.
what kind of cement works best on glass and pottery?
Verb
A win would cement her reputation as a strong competitor.
Recent Examples on the Web
Ryan MacAsero, The Mercury News, 6 Nov. 2024
The only illumination was what passed through the corridor from the courtyard, a wedge of cold, muted light on the cement floor.
—Greg Jackson, The New Yorker, 3 Nov. 2024
Danny Emerman, The Mercury News, 6 Nov. 2024
Colorado is looking to cement its blue reputation in the 2024 election.
—John Frank, Axios, 5 Nov. 2024
See all Example Sentences for cement 
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Noun
Her father was an Army veteran and union cement mason in the county.
—Ryan MacAsero, The Mercury News, 6 Nov. 2024
The only illumination was what passed through the corridor from the courtyard, a wedge of cold, muted light on the cement floor.
—Greg Jackson, The New Yorker, 3 Nov. 2024
Verb
Draymond Green, who struggled with his jump shot on the night, hit three of four in the final minute to cement the win.
—Danny Emerman, The Mercury News, 6 Nov. 2024
Colorado is looking to cement its blue reputation in the 2024 election.
—John Frank, Axios, 5 Nov. 2024
See all Example Sentences for cement
Dictionary Entries Near cement
Cite this Entry
“Cement.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cement. Accessed 22 Nov. 2024.
Copy CitationKids Definition
cement
1 of 2 noun
ce·ment
si-ˈment 
cement
2 of 2 verb1
: to unite by or as if by cement
cemented their friendship
2
: to cover with concrete
cementer
noun
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