What does "cement" mean?

Cement: A kind of calcined limestone, or a calcined mixture of clay and lime, for making mortar which will harden under water.

Additional senses

  1. 2.The powder used in cementation. See Cementation, n.., 2.
  2. 3.Bond of union; that which unites firmly, as persons in friendship, or men in society. "The cement of our love."
  3. 4.(Anat.) The layer of bone investing the root and neck of a tooth; -- called also cementum. Hydraulic cement. See under Hydraulic.
  4. 5.To unite or cause to adhere by means of a cement. Bp. Burnet.
  5. 6.To unite firmly or closely. Shak.
  6. 7.To overlay or coat with cement; as, to cement a cellar bottom.
  7. 8.To become cemented or firmly united; to cohere. S. Sharp.

Sources