"pitch pipe" meaning in English

{
  "forms": [
    {
      "form": "pitch pipes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pitch pipe (plural pitch pipes)",
      "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": "Music",
          "orig": "en:Music",
          "parents": [
            "Art",
            "Sound",
            "Culture",
            "Energy",
            "Society",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Woodwind instruments",
          "orig": "en:Woodwind instruments",
          "parents": [
            "Wind instruments",
            "Musical instruments",
            "Music",
            "Tools",
            "Art",
            "Sound",
            "Technology",
            "Culture",
            "Energy",
            "All topics",
            "Society",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A device much like a harmonica, used to supply a sought pitch."
      ],
      "id": "en-pitch_pipe-en-noun-Qi12~wIE",
      "links": [
        [
          "music",
          "music"
        ],
        [
          "harmonica",
          "harmonica"
        ]
      ],
      "raw_glosses": [
        "(music) A device much like a harmonica, used to supply a sought pitch."
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "device",
          "tags": [
            "feminine"
          ],
          "word": "ladička"
        },
        {
          "code": "eo",
          "lang": "Esperanto",
          "sense": "device",
          "word": "agordilo"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "device",
          "word": "virityspilli"
        },
        {
          "code": "ga",
          "lang": "Irish",
          "sense": "device",
          "tags": [
            "feminine"
          ],
          "word": "fideog airde"
        }
      ]
    }
  ],
  "word": "pitch pipe"
}

{
  "forms": [
    {
      "form": "pitch pipes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "pitch pipe (plural pitch pipes)",
      "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:Music",
        "en:Woodwind instruments"
      ],
      "glosses": [
        "A device much like a harmonica, used to supply a sought pitch."
      ],
      "links": [
        [
          "music",
          "music"
        ],
        [
          "harmonica",
          "harmonica"
        ]
      ],
      "raw_glosses": [
        "(music) A device much like a harmonica, used to supply a sought pitch."
      ],
      "topics": [
        "entertainment",
        "lifestyle",
        "music"
      ]
    }
  ],
  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "device",
      "tags": [
        "feminine"
      ],
      "word": "ladička"
    },
    {
      "code": "eo",
      "lang": "Esperanto",
      "sense": "device",
      "word": "agordilo"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "device",
      "word": "virityspilli"
    },
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "device",
      "tags": [
        "feminine"
      ],
      "word": "fideog airde"
    }
  ],
  "word": "pitch pipe"
}