"anti-knock" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "anti-knock",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "antiknock"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1951 October 26, FLIGHT and Aircraft Engineer, London, page 540, column 1:",
          "text": "He started testing fuels for their anti-knock qualities, using a single-cylinder test engine and expressing resistance to knocking by an H.U.C.R. (highest useful compression ratio) figure.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of antiknock"
      ],
      "id": "en-anti-knock-en-adj-N~htO9xl",
      "links": [
        [
          "antiknock",
          "antiknock#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "anti-knock"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "anti-knock",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "alt_of": [
        {
          "word": "antiknock"
        }
      ],
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1951 October 26, FLIGHT and Aircraft Engineer, London, page 540, column 1:",
          "text": "He started testing fuels for their anti-knock qualities, using a single-cylinder test engine and expressing resistance to knocking by an H.U.C.R. (highest useful compression ratio) figure.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of antiknock"
      ],
      "links": [
        [
          "antiknock",
          "antiknock#English"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "anti-knock"
}