noun A powdered substance produced by firing (calcining) calcium carbonate (limestone) and clay that develops strong cohesive properties when mixed with water. The main ingredient of concrete.
noun The paste-like substance resulting from mixing such a powder with water, or the rock-like substance that forms when it dries.
noun Any material with strong adhesive and cohesive properties such as binding agents, glues, grout.
noun A bond of union; that which unites firmly, as persons in friendship or in society.
the cement of our love
noun The layer of bone investing the root and neck of a tooth; cementum.