"HarCo" meaning in English

{
  "etymology_text": "From the two initial syllables.",
  "head_templates": [
    {
      "args": {},
      "expansion": "HarCo",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Nicknames for places",
          "orig": "en:Nicknames for places",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "Places",
          "orig": "en:Places",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "en",
          "name": "Places in Maryland, USA",
          "orig": "en:Places in Maryland, USA",
          "parents": [
            "Places"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Harford County, Maryland."
      ],
      "id": "en-HarCo-en-name-PsoQs-NL",
      "links": [
        [
          "Harford County, Maryland",
          "Harford County"
        ]
      ],
      "raw_glosses": [
        "(US, slang) Harford County, Maryland."
      ],
      "tags": [
        "US",
        "slang"
      ]
    }
  ],
  "word": "HarCo"
}

{
  "etymology_text": "From the two initial syllables.",
  "head_templates": [
    {
      "args": {},
      "expansion": "HarCo",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "American English",
        "English entries with incorrect language header",
        "English lemmas",
        "English proper nouns",
        "English slang",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Nicknames for places",
        "en:Places",
        "en:Places in Maryland, USA"
      ],
      "glosses": [
        "Harford County, Maryland."
      ],
      "links": [
        [
          "Harford County, Maryland",
          "Harford County"
        ]
      ],
      "raw_glosses": [
        "(US, slang) Harford County, Maryland."
      ],
      "tags": [
        "US",
        "slang"
      ]
    }
  ],
  "word": "HarCo"
}