"triangular harp" meaning in English

{
  "forms": [
    {
      "form": "triangular harps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "triangular harp (plural triangular harps)",
      "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 entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "String instruments",
          "orig": "en:String instruments",
          "parents": [
            "Musical instruments",
            "Music",
            "Tools",
            "Art",
            "Sound",
            "Technology",
            "Culture",
            "Energy",
            "All topics",
            "Society",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of frame harp"
      ],
      "id": "en-triangular_harp-en-noun-yx8f~~4i",
      "links": [
        [
          "frame harp",
          "frame harp#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "frame harp"
        }
      ]
    }
  ],
  "word": "triangular harp"
}

{
  "forms": [
    {
      "form": "triangular harps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "triangular harp (plural triangular harps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:String instruments"
      ],
      "glosses": [
        "Synonym of frame harp"
      ],
      "links": [
        [
          "frame harp",
          "frame harp#English"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "frame harp"
        }
      ]
    }
  ],
  "word": "triangular harp"
}