"expando" meaning in English

{
  "etymology_text": "Perhaps a short form of expandable object.",
  "forms": [
    {
      "form": "expandos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "expando (plural expandos)",
      "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 4 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"
        }
      ],
      "examples": [
        {
          "ref": "2009, Ted Pattison, Daniel Larson, Inside Microsoft Windows Sharepoint Services 3.0:",
          "text": "Because JavaScript objects are not constrained to predefined interfaces as they are with .NET objects, you can set expando properties on any object.",
          "type": "quote"
        },
        {
          "ref": "2010, Alexei White, JavaScript Programmer's Reference:",
          "text": "I talk more about expandos in Chapter 10. This means that you can arbitrarily add new properties to an object whenever you want.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A property added to an object at run-time."
      ],
      "id": "en-expando-en-noun--w0JIM81",
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "property",
          "property"
        ],
        [
          "run-time",
          "run-time"
        ]
      ],
      "raw_glosses": [
        "(programming) A property added to an object at run-time."
      ],
      "related": [
        {
          "word": "duck typing"
        }
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-uk-expando.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/5c/En-uk-expando.ogg/En-uk-expando.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/En-uk-expando.ogg"
    },
    {
      "rhymes": "-ændəʊ"
    }
  ],
  "word": "expando"
}

{
  "etymology_text": "Perhaps a short form of expandable object.",
  "forms": [
    {
      "form": "expandos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "expando (plural expandos)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "duck typing"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms with quotations",
        "Pages with 4 entries",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "Rhymes:English/ændəʊ",
        "Rhymes:English/ændəʊ/3 syllables",
        "en:Programming"
      ],
      "examples": [
        {
          "ref": "2009, Ted Pattison, Daniel Larson, Inside Microsoft Windows Sharepoint Services 3.0:",
          "text": "Because JavaScript objects are not constrained to predefined interfaces as they are with .NET objects, you can set expando properties on any object.",
          "type": "quote"
        },
        {
          "ref": "2010, Alexei White, JavaScript Programmer's Reference:",
          "text": "I talk more about expandos in Chapter 10. This means that you can arbitrarily add new properties to an object whenever you want.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A property added to an object at run-time."
      ],
      "links": [
        [
          "programming",
          "programming#Noun"
        ],
        [
          "property",
          "property"
        ],
        [
          "run-time",
          "run-time"
        ]
      ],
      "raw_glosses": [
        "(programming) A property added to an object at run-time."
      ],
      "topics": [
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "programming",
        "sciences"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-uk-expando.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/5/5c/En-uk-expando.ogg/En-uk-expando.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/5/5c/En-uk-expando.ogg"
    },
    {
      "rhymes": "-ændəʊ"
    }
  ],
  "word": "expando"
}