"subfreezing" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "freezing"
      },
      "expansion": "sub- + freezing",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + freezing",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "subfreezing (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with sub-",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The arctic cold front brought subfreezing temperatures, snow, freezing rain and treacherous driving conditions.",
          "type": "example"
        },
        {
          "ref": "1959, Steam's Finest Hour, edited by David P. Morgan, Kalmbach Publishing Co., page 20 (photo caption)",
          "text": "A subfreezing December 1955 wind blows whistle steam past cab as J-5a 5439 with the Queen City yells for a Dayton (O.) crossing.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Colder than the freezing point of water; below 0 degrees C or 32 degrees F."
      ],
      "id": "en-subfreezing-en-adj-yiaNCBEv",
      "links": [
        [
          "Colder",
          "colder"
        ],
        [
          "freezing",
          "freezing"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "subfreezing"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sub",
        "3": "freezing"
      },
      "expansion": "sub- + freezing",
      "name": "prefix"
    }
  ],
  "etymology_text": "sub- + freezing",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "subfreezing (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with sub-",
        "English terms with quotations",
        "English terms with usage examples",
        "English uncomparable adjectives"
      ],
      "examples": [
        {
          "text": "The arctic cold front brought subfreezing temperatures, snow, freezing rain and treacherous driving conditions.",
          "type": "example"
        },
        {
          "ref": "1959, Steam's Finest Hour, edited by David P. Morgan, Kalmbach Publishing Co., page 20 (photo caption)",
          "text": "A subfreezing December 1955 wind blows whistle steam past cab as J-5a 5439 with the Queen City yells for a Dayton (O.) crossing.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Colder than the freezing point of water; below 0 degrees C or 32 degrees F."
      ],
      "links": [
        [
          "Colder",
          "colder"
        ],
        [
          "freezing",
          "freezing"
        ]
      ],
      "tags": [
        "not-comparable"
      ]
    }
  ],
  "word": "subfreezing"
}