1. free (the interior of a refrigerator or freezer) of accumulated ice, usually by turning it off for a period.
▪ (of a refrigerator or freezer) become free of accumulated ice, usually by being turned off for a period: "she opened the door to let the fridge defrost"
▪ thaw (frozen food) before cooking it: "defrost the turkey slowly"
▪ remove frost or ice from (the windscreen of a motor vehicle).