verb (used with or without object), cal·ci·fied, cal·ci·fy·ing.

  1. Physiology. to make or become calcareous or bony; harden by the deposit of calcium salts.
  2. Geology. to harden by deposition of calcium carbonate.
  3. to make or become rigid or intransigent, as in a political position.

verb -fies, -fying or -fied

  1. to convert or be converted into lime
  2. to harden or become hardened by impregnation with calcium salts

1785 (implied in calcified), from French calcifier, from stem of Latin calcem “lime” (see chalk (n.)) + -fy. Related: Calcifying; calcification.


  1. To make or become stony or chalky by deposition of calcium salts.
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