Definition of calefaction in English:



mass nounrare
  • The process of heating or warming.

    • ‘It is entirely erroneous to say all calefaction is from solar rays directly.’
    • ‘The principal producers of calefaction are power plants.’
    • ‘Coal-oil-fired generators and atomic energy plants cause large amounts of waste heat which is carried away as hot water and cause thermal pollution or calefaction.’
    • ‘Such ecological alterations as have been observed as a result of the local calefaction of the river to date appear to be relatively inconsequential.’
    • ‘The calefaction point of water is 178°, and that of alcohol 128°.’
    hotness, warmth, warmness, high temperature
    View synonyms


Late Middle English: from Old French, or from late Latin calefactio(n-), from calefacere ‘make warm’ (see calefacient).