"orthonormal function" meaning in English

{
  "forms": [
    {
      "form": "orthonormal functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "orthonormal function (plural orthonormal functions)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
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          "langcode": "en",
          "name": "Functions",
          "orig": "en:Functions",
          "parents": [
            "Algebra",
            "Calculus",
            "Geometry",
            "Mathematical analysis",
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      ],
      "glosses": [
        "An orthogonal function whose inner product with itself is unity"
      ],
      "id": "en-orthonormal_function-en-noun-BgO4953-",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "orthogonal function",
          "orthogonal function"
        ],
        [
          "inner product",
          "inner product"
        ],
        [
          "unity",
          "unity"
        ]
      ],
      "raw_glosses": [
        "(mathematics) An orthogonal function whose inner product with itself is unity"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "orthonormal function"
}

{
  "forms": [
    {
      "form": "orthonormal functions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "orthonormal function (plural orthonormal functions)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        "en:Functions",
        "en:Mathematics"
      ],
      "glosses": [
        "An orthogonal function whose inner product with itself is unity"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "orthogonal function",
          "orthogonal function"
        ],
        [
          "inner product",
          "inner product"
        ],
        [
          "unity",
          "unity"
        ]
      ],
      "raw_glosses": [
        "(mathematics) An orthogonal function whose inner product with itself is unity"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "orthonormal function"
}