"sing-in" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sing",
        "3": "-in"
      },
      "expansion": "sing + -in",
      "name": "af"
    }
  ],
  "etymology_text": "From sing + -in.",
  "forms": [
    {
      "form": "sing-ins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sing-in (plural sing-ins)",
      "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": "English terms suffixed with -in",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2012 March 28, Karen Lowe, “How Communal Singing Disappeared From American Life”, in The Atlantic",
          "text": "Although they're more fragmentary, the protest moments involving song still have Stamp excited: from ongoing sing-ins at courthouses to resist home foreclosures, to the night when Occupy was evicted from Zuccotti Park in November, when dozens of arrested activists sang \"Stand By Me\" and \"With a Little Help From My Friends\" in the halls of central booking.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A peaceful protest where people sing, often to obstruct the normal course of an event."
      ],
      "id": "en-sing-in-en-noun-6OP9qLPh",
      "links": [
        [
          "peaceful",
          "peaceful"
        ],
        [
          "protest",
          "protest"
        ],
        [
          "sing",
          "sing"
        ],
        [
          "obstruct",
          "obstruct"
        ],
        [
          "course",
          "course"
        ]
      ]
    }
  ],
  "word": "sing-in"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "sing",
        "3": "-in"
      },
      "expansion": "sing + -in",
      "name": "af"
    }
  ],
  "etymology_text": "From sing + -in.",
  "forms": [
    {
      "form": "sing-ins",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "sing-in (plural sing-ins)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms suffixed with -in",
        "English terms with quotations"
      ],
      "examples": [
        {
          "ref": "2012 March 28, Karen Lowe, “How Communal Singing Disappeared From American Life”, in The Atlantic",
          "text": "Although they're more fragmentary, the protest moments involving song still have Stamp excited: from ongoing sing-ins at courthouses to resist home foreclosures, to the night when Occupy was evicted from Zuccotti Park in November, when dozens of arrested activists sang \"Stand By Me\" and \"With a Little Help From My Friends\" in the halls of central booking.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A peaceful protest where people sing, often to obstruct the normal course of an event."
      ],
      "links": [
        [
          "peaceful",
          "peaceful"
        ],
        [
          "protest",
          "protest"
        ],
        [
          "sing",
          "sing"
        ],
        [
          "obstruct",
          "obstruct"
        ],
        [
          "course",
          "course"
        ]
      ]
    }
  ],
  "word": "sing-in"
}