Cement definition

sĭ-mĕnt
A substance that hardens to act as an adhesive; glue.
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Something that serves to bind or unite.
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(geology) A chemically precipitated substance that binds particles of clastic rocks.
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To bind with or as if with cement.
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To cover or coat with cement.
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To become cemented.
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Any soft substance that fastens things together firmly when it hardens, as glue.
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Anything that joins together or unites; bond.
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Cement means to join together or cover with a binding agent, particularly a substance made of burned lime, clay, sand and water.

An example of cement is to fix a hole in the sidewalk.

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(dentistry) A substance used for filling cavities or anchoring crowns, inlays, or other restorations.
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A building material made by grinding calcined limestone and clay to a fine powder, which can be mixed with water and poured to set as a solid mass or used as an ingredient in making mortar or concrete.
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Portland cement.
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Concrete.
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The fine-grained material that binds together the larger constituents in many kinds of sedimentary or clastic rock.
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(dentistry) A cementlike substance used to fill cavities, set crowns, etc.
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(metallurgy) A dust or powder, as of charcoal or sand, or a finely divided metal, used in cementation.
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A powdered substance made of burned lime and clay, mixed with water and sand to make mortar or with water, sand, and gravel to make concrete: the mixture hardens when it dries.
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To join or unite with or as with cement.
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To cover with cement.
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To establish firmly or make stronger.

To cement a friendship.

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(dentistry) A substance used for filling cavities or anchoring crowns, inlays, or other restorations.
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(uncountable) A powdered substance that develops strong adhesive properties when mixed with water.
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(uncountable) The paste-like substance resulting from mixing such a powder with water.
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(uncountable) Any material with strong adhesive properties.
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(figuratively) Bond of union; that which unites firmly, as persons in friendship or in society.

The cement of our love.

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(anatomy) The layer of bone investing the root and neck of a tooth; cementum.
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To affix with cement.
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To overlay or coat with cement.

To cement a cellar bottom.

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(figuratively) To unite firmly or closely.

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(figuratively) To make permanent.
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The definition of cement is anything that binds, particularly a substance made of burned lime, clay, sand and water to make mortar or sand, water and gravel to make concrete.

An example of cement is the material used for a foundation of a house.

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in cement
  • Firmly settled or determined; unalterable:
    The administration's position on taxes was set in cement despite the unfavorable public response.
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Other Word Forms

Noun

Singular:
cement
Plural:
cements

Idioms and Phrasal Verbs

in cement

Origin of cement

  • Middle English from Old French ciment from Latin caementum rough-cut stone, rubble used in making concrete from caedere to cut kaə-id- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Old French ciment, from Latin caementum (“quarry stone; stone chips for making mortar”), from caedo (“I cut, hew”).

    From Wiktionary