"quux" meaning in English

{
  "etymology_text": "Attributed to Guy L. Steele Jr.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "quux (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "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 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Programming",
          "orig": "en:Programming",
          "parents": [
            "Computing",
            "Software engineering",
            "Technology",
            "Computer science",
            "Engineering",
            "Software",
            "All topics",
            "Sciences",
            "Applied sciences",
            "Media",
            "Fundamental",
            "Communication"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Metasyntactic variable."
      ],
      "id": "en-quux-en-noun-ilCnpgzl",
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "Metasyntactic variable",
          "metasyntactic variable#English"
        ]
      ],
      "raw_glosses": [
        "(programming) Metasyntactic variable."
      ],
      "synonyms": [
        {
          "word": "foo"
        },
        {
          "tags": [
            "common"
          ],
          "word": "bar"
        },
        {
          "word": "baz"
        },
        {
          "word": "qux"
        }
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ],
      "wikipedia": [
        "Guy L. Steele Jr."
      ]
    }
  ],
  "word": "quux"
}

{
  "etymology_text": "Attributed to Guy L. Steele Jr.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "quux (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English placeholder terms",
        "English uncountable nouns",
        "Pages with 2 entries",
        "Pages with entries",
        "en:Programming"
      ],
      "glosses": [
        "Metasyntactic variable."
      ],
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "Metasyntactic variable",
          "metasyntactic variable#English"
        ]
      ],
      "raw_glosses": [
        "(programming) Metasyntactic variable."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ],
      "wikipedia": [
        "Guy L. Steele Jr."
      ]
    }
  ],
  "synonyms": [
    {
      "word": "foo"
    },
    {
      "tags": [
        "common"
      ],
      "word": "bar"
    },
    {
      "word": "baz"
    },
    {
      "word": "qux"
    }
  ],
  "word": "quux"
}