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Entry 3 senses · 2 variants Webster, 1913

defrost

· IPA /diːˈfɹɔst/
01 v. t. To remove the frost or ice from; as, to defrost the car window; to defrost a refrigerator.
  1. 1.
    To remove the frost or ice from; as, to defrost the car window; to defrost a refrigerator.
Syn. deice.
02 v. i. To become free of frost or ice; as, it took four hours for the refrigerator to defrost.
  1. 1.
    To become free of frost or ice; as, it took four hours for the refrigerator to defrost.
  2. 2.
    To thaw; -- used especially of items removed from a freezer, such as frozen foods.
Syn. deice.