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
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
Neetika Walter, Interesting Engineering, 27 Oct. 2025
Fiber cement siding is more moisture-resistant and can be painted every seven to 10 years.
—Brandee Gruener, Southern Living, 26 Oct. 2025
David Browne, Rolling Stone, 26 Oct. 2025
As Bobrovsky cements his own case for the Hockey Hall of Fame, his vinous gifts are stocking up teammates’ cellars.
—Julian McKenzie, New York Times, 26 Oct. 2025
See All Example Sentences for cement
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Noun
These prototypes met Australian standards for load-bearing concrete and showed 30 percent better insulation than conventional cement bricks.
—Neetika Walter, Interesting Engineering, 27 Oct. 2025
Fiber cement siding is more moisture-resistant and can be painted every seven to 10 years.
—Brandee Gruener, Southern Living, 26 Oct. 2025
Verb
As the box hurtles toward its finale — the complete recording of his fall 1963 Carnegie Hall concert, which cemented his stature — Dylan’s feel for traditional songs grows deeper, and the growth in his own songwriting, so quickly, remains astounding.
—David Browne, Rolling Stone, 26 Oct. 2025
As Bobrovsky cements his own case for the Hockey Hall of Fame, his vinous gifts are stocking up teammates’ cellars.
—Julian McKenzie, New York Times, 26 Oct. 2025
See All Example Sentences for cement
Cite this Entry
“Cement.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cement. Accessed 31 Oct. 2025.
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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